diff --git a/docs/assets/plugins/search/lunr.min.js b/docs/assets/plugins/search/lunr.min.js
index d521877805..d746af24a3 100644
--- a/docs/assets/plugins/search/lunr.min.js
+++ b/docs/assets/plugins/search/lunr.min.js
@@ -3,4 +3,1308 @@
  * Copyright (C) 2020 Oliver Nightingale
  * @license MIT
  */
- !function(){var e=function(t){var r=new e.Builder;return r.pipeline.add(e.trimmer,e.stopWordFilter,e.stemmer),r.searchPipeline.add(e.stemmer),t.call(r,r),r.build()};e.version="2.3.9",e.utils={},e.utils.warn=function(e){return function(t){e.console&&console.warn&&console.warn(t)}}(this),e.utils.asString=function(e){return void 0===e||null===e?"":e.toString()},e.utils.clone=function(e){if(null===e||void 0===e)return e;for(var t=Object.create(null),r=Object.keys(e),i=0;i<r.length;i++){var n=r[i],s=e[n];if(Array.isArray(s))t[n]=s.slice();else{if("string"!=typeof s&&"number"!=typeof s&&"boolean"!=typeof s)throw new TypeError("clone is not deep and does not support nested objects");t[n]=s}}return t},e.FieldRef=function(e,t,r){this.docRef=e,this.fieldName=t,this._stringValue=r},e.FieldRef.joiner="/",e.FieldRef.fromString=function(t){var r=t.indexOf(e.FieldRef.joiner);if(r===-1)throw"malformed field ref string";var i=t.slice(0,r),n=t.slice(r+1);return new e.FieldRef(n,i,t)},e.FieldRef.prototype.toString=function(){return void 0==this._stringValue&&(this._stringValue=this.fieldName+e.FieldRef.joiner+this.docRef),this._stringValue},e.Set=function(e){if(this.elements=Object.create(null),e){this.length=e.length;for(var t=0;t<this.length;t++)this.elements[e[t]]=!0}else this.length=0},e.Set.complete={intersect:function(e){return e},union:function(){return this},contains:function(){return!0}},e.Set.empty={intersect:function(){return this},union:function(e){return e},contains:function(){return!1}},e.Set.prototype.contains=function(e){return!!this.elements[e]},e.Set.prototype.intersect=function(t){var r,i,n,s=[];if(t===e.Set.complete)return this;if(t===e.Set.empty)return t;this.length<t.length?(r=this,i=t):(r=t,i=this),n=Object.keys(r.elements);for(var o=0;o<n.length;o++){var a=n[o];a in i.elements&&s.push(a)}return new e.Set(s)},e.Set.prototype.union=function(t){return t===e.Set.complete?e.Set.complete:t===e.Set.empty?this:new e.Set(Object.keys(this.elements).concat(Object.keys(t.elements)))},e.idf=function(e,t){var r=0;for(var i in e)"_index"!=i&&(r+=Object.keys(e[i]).length);var n=(t-r+.5)/(r+.5);return Math.log(1+Math.abs(n))},e.Token=function(e,t){this.str=e||"",this.metadata=t||{}},e.Token.prototype.toString=function(){return this.str},e.Token.prototype.update=function(e){return this.str=e(this.str,this.metadata),this},e.Token.prototype.clone=function(t){return t=t||function(e){return e},new e.Token(t(this.str,this.metadata),this.metadata)},e.tokenizer=function(t,r){if(null==t||void 0==t)return[];if(Array.isArray(t))return t.map(function(t){return new e.Token(e.utils.asString(t).toLowerCase(),e.utils.clone(r))});for(var i=t.toString().toLowerCase(),n=i.length,s=[],o=0,a=0;o<=n;o++){var u=i.charAt(o),l=o-a;if(u.match(e.tokenizer.separator)||o==n){if(l>0){var c=e.utils.clone(r)||{};c.position=[a,l],c.index=s.length,s.push(new e.Token(i.slice(a,o),c))}a=o+1}}return s},e.tokenizer.separator=/[\s\-]+/,e.Pipeline=function(){this._stack=[]},e.Pipeline.registeredFunctions=Object.create(null),e.Pipeline.registerFunction=function(t,r){r in this.registeredFunctions&&e.utils.warn("Overwriting existing registered function: "+r),t.label=r,e.Pipeline.registeredFunctions[t.label]=t},e.Pipeline.warnIfFunctionNotRegistered=function(t){var r=t.label&&t.label in this.registeredFunctions;r||e.utils.warn("Function is not registered with pipeline. This may cause problems when serialising the index.\n",t)},e.Pipeline.load=function(t){var r=new e.Pipeline;return t.forEach(function(t){var i=e.Pipeline.registeredFunctions[t];if(!i)throw new Error("Cannot load unregistered function: "+t);r.add(i)}),r},e.Pipeline.prototype.add=function(){var t=Array.prototype.slice.call(arguments);t.forEach(function(t){e.Pipeline.warnIfFunctionNotRegistered(t),this._stack.push(t)},this)},e.Pipeline.prototype.after=function(t,r){e.Pipeline.warnIfFunctionNotRegistered(r);var i=this._stack.indexOf(t);if(i==-1)throw new Error("Cannot find existingFn");i+=1,this._stack.splice(i,0,r)},e.Pipeline.prototype.before=function(t,r){e.Pipeline.warnIfFunctionNotRegistered(r);var i=this._stack.indexOf(t);if(i==-1)throw new Error("Cannot find existingFn");this._stack.splice(i,0,r)},e.Pipeline.prototype.remove=function(e){var t=this._stack.indexOf(e);t!=-1&&this._stack.splice(t,1)},e.Pipeline.prototype.run=function(e){for(var t=this._stack.length,r=0;r<t;r++){for(var i=this._stack[r],n=[],s=0;s<e.length;s++){var o=i(e[s],s,e);if(null!==o&&void 0!==o&&""!==o)if(Array.isArray(o))for(var a=0;a<o.length;a++)n.push(o[a]);else n.push(o)}e=n}return e},e.Pipeline.prototype.runString=function(t,r){var i=new e.Token(t,r);return this.run([i]).map(function(e){return e.toString()})},e.Pipeline.prototype.reset=function(){this._stack=[]},e.Pipeline.prototype.toJSON=function(){return this._stack.map(function(t){return e.Pipeline.warnIfFunctionNotRegistered(t),t.label})},e.Vector=function(e){this._magnitude=0,this.elements=e||[]},e.Vector.prototype.positionForIndex=function(e){if(0==this.elements.length)return 0;for(var t=0,r=this.elements.length/2,i=r-t,n=Math.floor(i/2),s=this.elements[2*n];i>1&&(s<e&&(t=n),s>e&&(r=n),s!=e);)i=r-t,n=t+Math.floor(i/2),s=this.elements[2*n];return s==e?2*n:s>e?2*n:s<e?2*(n+1):void 0},e.Vector.prototype.insert=function(e,t){this.upsert(e,t,function(){throw"duplicate index"})},e.Vector.prototype.upsert=function(e,t,r){this._magnitude=0;var i=this.positionForIndex(e);this.elements[i]==e?this.elements[i+1]=r(this.elements[i+1],t):this.elements.splice(i,0,e,t)},e.Vector.prototype.magnitude=function(){if(this._magnitude)return this._magnitude;for(var e=0,t=this.elements.length,r=1;r<t;r+=2){var i=this.elements[r];e+=i*i}return this._magnitude=Math.sqrt(e)},e.Vector.prototype.dot=function(e){for(var t=0,r=this.elements,i=e.elements,n=r.length,s=i.length,o=0,a=0,u=0,l=0;u<n&&l<s;)o=r[u],a=i[l],o<a?u+=2:o>a?l+=2:o==a&&(t+=r[u+1]*i[l+1],u+=2,l+=2);return t},e.Vector.prototype.similarity=function(e){return this.dot(e)/this.magnitude()||0},e.Vector.prototype.toArray=function(){for(var e=new Array(this.elements.length/2),t=1,r=0;t<this.elements.length;t+=2,r++)e[r]=this.elements[t];return e},e.Vector.prototype.toJSON=function(){return this.elements},e.stemmer=function(){var e={ational:"ate",tional:"tion",enci:"ence",anci:"ance",izer:"ize",bli:"ble",alli:"al",entli:"ent",eli:"e",ousli:"ous",ization:"ize",ation:"ate",ator:"ate",alism:"al",iveness:"ive",fulness:"ful",ousness:"ous",aliti:"al",iviti:"ive",biliti:"ble",logi:"log"},t={icate:"ic",ative:"",alize:"al",iciti:"ic",ical:"ic",ful:"",ness:""},r="[^aeiou]",i="[aeiouy]",n=r+"[^aeiouy]*",s=i+"[aeiou]*",o="^("+n+")?"+s+n,a="^("+n+")?"+s+n+"("+s+")?$",u="^("+n+")?"+s+n+s+n,l="^("+n+")?"+i,c=new RegExp(o),h=new RegExp(u),d=new RegExp(a),f=new RegExp(l),p=/^(.+?)(ss|i)es$/,y=/^(.+?)([^s])s$/,m=/^(.+?)eed$/,v=/^(.+?)(ed|ing)$/,g=/.$/,x=/(at|bl|iz)$/,w=new RegExp("([^aeiouylsz])\\1$"),Q=new RegExp("^"+n+i+"[^aeiouwxy]$"),k=/^(.+?[^aeiou])y$/,S=/^(.+?)(ational|tional|enci|anci|izer|bli|alli|entli|eli|ousli|ization|ation|ator|alism|iveness|fulness|ousness|aliti|iviti|biliti|logi)$/,E=/^(.+?)(icate|ative|alize|iciti|ical|ful|ness)$/,L=/^(.+?)(al|ance|ence|er|ic|able|ible|ant|ement|ment|ent|ou|ism|ate|iti|ous|ive|ize)$/,b=/^(.+?)(s|t)(ion)$/,P=/^(.+?)e$/,T=/ll$/,O=new RegExp("^"+n+i+"[^aeiouwxy]$"),I=function(r){var i,n,s,o,a,u,l;if(r.length<3)return r;if(s=r.substr(0,1),"y"==s&&(r=s.toUpperCase()+r.substr(1)),o=p,a=y,o.test(r)?r=r.replace(o,"$1$2"):a.test(r)&&(r=r.replace(a,"$1$2")),o=m,a=v,o.test(r)){var I=o.exec(r);o=c,o.test(I[1])&&(o=g,r=r.replace(o,""))}else if(a.test(r)){var I=a.exec(r);i=I[1],a=f,a.test(i)&&(r=i,a=x,u=w,l=Q,a.test(r)?r+="e":u.test(r)?(o=g,r=r.replace(o,"")):l.test(r)&&(r+="e"))}if(o=k,o.test(r)){var I=o.exec(r);i=I[1],r=i+"i"}if(o=S,o.test(r)){var I=o.exec(r);i=I[1],n=I[2],o=c,o.test(i)&&(r=i+e[n])}if(o=E,o.test(r)){var I=o.exec(r);i=I[1],n=I[2],o=c,o.test(i)&&(r=i+t[n])}if(o=L,a=b,o.test(r)){var I=o.exec(r);i=I[1],o=h,o.test(i)&&(r=i)}else if(a.test(r)){var I=a.exec(r);i=I[1]+I[2],a=h,a.test(i)&&(r=i)}if(o=P,o.test(r)){var I=o.exec(r);i=I[1],o=h,a=d,u=O,(o.test(i)||a.test(i)&&!u.test(i))&&(r=i)}return o=T,a=h,o.test(r)&&a.test(r)&&(o=g,r=r.replace(o,"")),"y"==s&&(r=s.toLowerCase()+r.substr(1)),r};return function(e){return e.update(I)}}(),e.Pipeline.registerFunction(e.stemmer,"stemmer"),e.generateStopWordFilter=function(e){var t=e.reduce(function(e,t){return e[t]=t,e},{});return function(e){if(e&&t[e.toString()]!==e.toString())return e}},e.stopWordFilter=e.generateStopWordFilter(["a","able","about","across","after","all","almost","also","am","among","an","and","any","are","as","at","be","because","been","but","by","can","cannot","could","dear","did","do","does","either","else","ever","every","for","from","get","got","had","has","have","he","her","hers","him","his","how","however","i","if","in","into","is","it","its","just","least","let","like","likely","may","me","might","most","must","my","neither","no","nor","not","of","off","often","on","only","or","other","our","own","rather","said","say","says","she","should","since","so","some","than","that","the","their","them","then","there","these","they","this","tis","to","too","twas","us","wants","was","we","were","what","when","where","which","while","who","whom","why","will","with","would","yet","you","your"]),e.Pipeline.registerFunction(e.stopWordFilter,"stopWordFilter"),e.trimmer=function(e){return e.update(function(e){return e.replace(/^\W+/,"").replace(/\W+$/,"")})},e.Pipeline.registerFunction(e.trimmer,"trimmer"),e.TokenSet=function(){this["final"]=!1,this.edges={},this.id=e.TokenSet._nextId,e.TokenSet._nextId+=1},e.TokenSet._nextId=1,e.TokenSet.fromArray=function(t){for(var r=new e.TokenSet.Builder,i=0,n=t.length;i<n;i++)r.insert(t[i]);return r.finish(),r.root},e.TokenSet.fromClause=function(t){return"editDistance"in t?e.TokenSet.fromFuzzyString(t.term,t.editDistance):e.TokenSet.fromString(t.term)},e.TokenSet.fromFuzzyString=function(t,r){for(var i=new e.TokenSet,n=[{node:i,editsRemaining:r,str:t}];n.length;){var s=n.pop();if(s.str.length>0){var o,a=s.str.charAt(0);a in s.node.edges?o=s.node.edges[a]:(o=new e.TokenSet,s.node.edges[a]=o),1==s.str.length&&(o["final"]=!0),n.push({node:o,editsRemaining:s.editsRemaining,str:s.str.slice(1)})}if(0!=s.editsRemaining){if("*"in s.node.edges)var u=s.node.edges["*"];else{var u=new e.TokenSet;s.node.edges["*"]=u}if(0==s.str.length&&(u["final"]=!0),n.push({node:u,editsRemaining:s.editsRemaining-1,str:s.str}),s.str.length>1&&n.push({node:s.node,editsRemaining:s.editsRemaining-1,str:s.str.slice(1)}),1==s.str.length&&(s.node["final"]=!0),s.str.length>=1){if("*"in s.node.edges)var l=s.node.edges["*"];else{var l=new e.TokenSet;s.node.edges["*"]=l}1==s.str.length&&(l["final"]=!0),n.push({node:l,editsRemaining:s.editsRemaining-1,str:s.str.slice(1)})}if(s.str.length>1){var c,h=s.str.charAt(0),d=s.str.charAt(1);d in s.node.edges?c=s.node.edges[d]:(c=new e.TokenSet,s.node.edges[d]=c),1==s.str.length&&(c["final"]=!0),n.push({node:c,editsRemaining:s.editsRemaining-1,str:h+s.str.slice(2)})}}}return i},e.TokenSet.fromString=function(t){for(var r=new e.TokenSet,i=r,n=0,s=t.length;n<s;n++){var o=t[n],a=n==s-1;if("*"==o)r.edges[o]=r,r["final"]=a;else{var u=new e.TokenSet;u["final"]=a,r.edges[o]=u,r=u}}return i},e.TokenSet.prototype.toArray=function(){for(var e=[],t=[{prefix:"",node:this}];t.length;){var r=t.pop(),i=Object.keys(r.node.edges),n=i.length;r.node["final"]&&(r.prefix.charAt(0),e.push(r.prefix));for(var s=0;s<n;s++){var o=i[s];t.push({prefix:r.prefix.concat(o),node:r.node.edges[o]})}}return e},e.TokenSet.prototype.toString=function(){if(this._str)return this._str;for(var e=this["final"]?"1":"0",t=Object.keys(this.edges).sort(),r=t.length,i=0;i<r;i++){var n=t[i],s=this.edges[n];e=e+n+s.id}return e},e.TokenSet.prototype.intersect=function(t){for(var r=new e.TokenSet,i=void 0,n=[{qNode:t,output:r,node:this}];n.length;){i=n.pop();for(var s=Object.keys(i.qNode.edges),o=s.length,a=Object.keys(i.node.edges),u=a.length,l=0;l<o;l++)for(var c=s[l],h=0;h<u;h++){var d=a[h];if(d==c||"*"==c){var f=i.node.edges[d],p=i.qNode.edges[c],y=f["final"]&&p["final"],m=void 0;d in i.output.edges?(m=i.output.edges[d],m["final"]=m["final"]||y):(m=new e.TokenSet,m["final"]=y,i.output.edges[d]=m),n.push({qNode:p,output:m,node:f})}}}return r},e.TokenSet.Builder=function(){this.previousWord="",this.root=new e.TokenSet,this.uncheckedNodes=[],this.minimizedNodes={}},e.TokenSet.Builder.prototype.insert=function(t){var r,i=0;if(t<this.previousWord)throw new Error("Out of order word insertion");for(var n=0;n<t.length&&n<this.previousWord.length&&t[n]==this.previousWord[n];n++)i++;this.minimize(i),r=0==this.uncheckedNodes.length?this.root:this.uncheckedNodes[this.uncheckedNodes.length-1].child;for(var n=i;n<t.length;n++){var s=new e.TokenSet,o=t[n];r.edges[o]=s,this.uncheckedNodes.push({parent:r,"char":o,child:s}),r=s}r["final"]=!0,this.previousWord=t},e.TokenSet.Builder.prototype.finish=function(){this.minimize(0)},e.TokenSet.Builder.prototype.minimize=function(e){for(var t=this.uncheckedNodes.length-1;t>=e;t--){var r=this.uncheckedNodes[t],i=r.child.toString();i in this.minimizedNodes?r.parent.edges[r["char"]]=this.minimizedNodes[i]:(r.child._str=i,this.minimizedNodes[i]=r.child),this.uncheckedNodes.pop()}},e.Index=function(e){this.invertedIndex=e.invertedIndex,this.fieldVectors=e.fieldVectors,this.tokenSet=e.tokenSet,this.fields=e.fields,this.pipeline=e.pipeline},e.Index.prototype.search=function(t){return this.query(function(r){var i=new e.QueryParser(t,r);i.parse()})},e.Index.prototype.query=function(t){for(var r=new e.Query(this.fields),i=Object.create(null),n=Object.create(null),s=Object.create(null),o=Object.create(null),a=Object.create(null),u=0;u<this.fields.length;u++)n[this.fields[u]]=new e.Vector;t.call(r,r);for(var u=0;u<r.clauses.length;u++){var l=r.clauses[u],c=null,h=e.Set.empty;c=l.usePipeline?this.pipeline.runString(l.term,{fields:l.fields}):[l.term];for(var d=0;d<c.length;d++){var f=c[d];l.term=f;var p=e.TokenSet.fromClause(l),y=this.tokenSet.intersect(p).toArray();if(0===y.length&&l.presence===e.Query.presence.REQUIRED){for(var m=0;m<l.fields.length;m++){var v=l.fields[m];o[v]=e.Set.empty}break}for(var g=0;g<y.length;g++)for(var x=y[g],w=this.invertedIndex[x],Q=w._index,m=0;m<l.fields.length;m++){var v=l.fields[m],k=w[v],S=Object.keys(k),E=x+"/"+v,L=new e.Set(S);if(l.presence==e.Query.presence.REQUIRED&&(h=h.union(L),void 0===o[v]&&(o[v]=e.Set.complete)),l.presence!=e.Query.presence.PROHIBITED){if(n[v].upsert(Q,l.boost,function(e,t){return e+t}),!s[E]){for(var b=0;b<S.length;b++){var P,T=S[b],O=new e.FieldRef(T,v),I=k[T];void 0===(P=i[O])?i[O]=new e.MatchData(x,v,I):P.add(x,v,I)}s[E]=!0}}else void 0===a[v]&&(a[v]=e.Set.empty),a[v]=a[v].union(L)}}if(l.presence===e.Query.presence.REQUIRED)for(var m=0;m<l.fields.length;m++){var v=l.fields[m];o[v]=o[v].intersect(h)}}for(var R=e.Set.complete,F=e.Set.empty,u=0;u<this.fields.length;u++){var v=this.fields[u];o[v]&&(R=R.intersect(o[v])),a[v]&&(F=F.union(a[v]))}var C=Object.keys(i),N=[],_=Object.create(null);if(r.isNegated()){C=Object.keys(this.fieldVectors);for(var u=0;u<C.length;u++){var O=C[u],j=e.FieldRef.fromString(O);i[O]=new e.MatchData}}for(var u=0;u<C.length;u++){var j=e.FieldRef.fromString(C[u]),D=j.docRef;if(R.contains(D)&&!F.contains(D)){var A,B=this.fieldVectors[j],V=n[j.fieldName].similarity(B);if(void 0!==(A=_[D]))A.score+=V,A.matchData.combine(i[j]);else{var z={ref:D,score:V,matchData:i[j]};_[D]=z,N.push(z)}}}return N.sort(function(e,t){return t.score-e.score})},e.Index.prototype.toJSON=function(){var t=Object.keys(this.invertedIndex).sort().map(function(e){return[e,this.invertedIndex[e]]},this),r=Object.keys(this.fieldVectors).map(function(e){return[e,this.fieldVectors[e].toJSON()]},this);return{version:e.version,fields:this.fields,fieldVectors:r,invertedIndex:t,pipeline:this.pipeline.toJSON()}},e.Index.load=function(t){var r={},i={},n=t.fieldVectors,s=Object.create(null),o=t.invertedIndex,a=new e.TokenSet.Builder,u=e.Pipeline.load(t.pipeline);t.version!=e.version&&e.utils.warn("Version mismatch when loading serialised index. Current version of lunr '"+e.version+"' does not match serialized index '"+t.version+"'");for(var l=0;l<n.length;l++){var c=n[l],h=c[0],d=c[1];i[h]=new e.Vector(d)}for(var l=0;l<o.length;l++){var c=o[l],f=c[0],p=c[1];a.insert(f),s[f]=p}return a.finish(),r.fields=t.fields,r.fieldVectors=i,r.invertedIndex=s,r.tokenSet=a.root,r.pipeline=u,new e.Index(r)},e.Builder=function(){this._ref="id",this._fields=Object.create(null),this._documents=Object.create(null),this.invertedIndex=Object.create(null),this.fieldTermFrequencies={},this.fieldLengths={},this.tokenizer=e.tokenizer,this.pipeline=new e.Pipeline,this.searchPipeline=new e.Pipeline,this.documentCount=0,this._b=.75,this._k1=1.2,this.termIndex=0,this.metadataWhitelist=[]},e.Builder.prototype.ref=function(e){this._ref=e},e.Builder.prototype.field=function(e,t){if(/\//.test(e))throw new RangeError("Field '"+e+"' contains illegal character '/'");this._fields[e]=t||{}},e.Builder.prototype.b=function(e){e<0?this._b=0:e>1?this._b=1:this._b=e},e.Builder.prototype.k1=function(e){this._k1=e},e.Builder.prototype.add=function(t,r){var i=t[this._ref],n=Object.keys(this._fields);this._documents[i]=r||{},this.documentCount+=1;for(var s=0;s<n.length;s++){var o=n[s],a=this._fields[o].extractor,u=a?a(t):t[o],l=this.tokenizer(u,{fields:[o]}),c=this.pipeline.run(l),h=new e.FieldRef(i,o),d=Object.create(null);this.fieldTermFrequencies[h]=d,this.fieldLengths[h]=0,this.fieldLengths[h]+=c.length;for(var f=0;f<c.length;f++){var p=c[f];if(void 0==d[p]&&(d[p]=0),d[p]+=1,void 0==this.invertedIndex[p]){var y=Object.create(null);y._index=this.termIndex,this.termIndex+=1;for(var m=0;m<n.length;m++)y[n[m]]=Object.create(null);this.invertedIndex[p]=y}void 0==this.invertedIndex[p][o][i]&&(this.invertedIndex[p][o][i]=Object.create(null));for(var v=0;v<this.metadataWhitelist.length;v++){var g=this.metadataWhitelist[v],x=p.metadata[g];void 0==this.invertedIndex[p][o][i][g]&&(this.invertedIndex[p][o][i][g]=[]),this.invertedIndex[p][o][i][g].push(x)}}}},e.Builder.prototype.calculateAverageFieldLengths=function(){for(var t=Object.keys(this.fieldLengths),r=t.length,i={},n={},s=0;s<r;s++){var o=e.FieldRef.fromString(t[s]),a=o.fieldName;n[a]||(n[a]=0),n[a]+=1,i[a]||(i[a]=0),i[a]+=this.fieldLengths[o]}for(var u=Object.keys(this._fields),s=0;s<u.length;s++){var l=u[s];i[l]=i[l]/n[l]}this.averageFieldLength=i},e.Builder.prototype.createFieldVectors=function(){for(var t={},r=Object.keys(this.fieldTermFrequencies),i=r.length,n=Object.create(null),s=0;s<i;s++){for(var o=e.FieldRef.fromString(r[s]),a=o.fieldName,u=this.fieldLengths[o],l=new e.Vector,c=this.fieldTermFrequencies[o],h=Object.keys(c),d=h.length,f=this._fields[a].boost||1,p=this._documents[o.docRef].boost||1,y=0;y<d;y++){var m,v,g,x=h[y],w=c[x],Q=this.invertedIndex[x]._index;void 0===n[x]?(m=e.idf(this.invertedIndex[x],this.documentCount),n[x]=m):m=n[x],v=m*((this._k1+1)*w)/(this._k1*(1-this._b+this._b*(u/this.averageFieldLength[a]))+w),v*=f,v*=p,g=Math.round(1e3*v)/1e3,l.insert(Q,g)}t[o]=l}this.fieldVectors=t},e.Builder.prototype.createTokenSet=function(){this.tokenSet=e.TokenSet.fromArray(Object.keys(this.invertedIndex).sort())},e.Builder.prototype.build=function(){return this.calculateAverageFieldLengths(),this.createFieldVectors(),this.createTokenSet(),new e.Index({invertedIndex:this.invertedIndex,fieldVectors:this.fieldVectors,tokenSet:this.tokenSet,fields:Object.keys(this._fields),pipeline:this.searchPipeline})},e.Builder.prototype.use=function(e){var t=Array.prototype.slice.call(arguments,1);t.unshift(this),e.apply(this,t)},e.MatchData=function(e,t,r){for(var i=Object.create(null),n=Object.keys(r||{}),s=0;s<n.length;s++){var o=n[s];i[o]=r[o].slice()}this.metadata=Object.create(null),void 0!==e&&(this.metadata[e]=Object.create(null),this.metadata[e][t]=i)},e.MatchData.prototype.combine=function(e){for(var t=Object.keys(e.metadata),r=0;r<t.length;r++){var i=t[r],n=Object.keys(e.metadata[i]);void 0==this.metadata[i]&&(this.metadata[i]=Object.create(null));for(var s=0;s<n.length;s++){var o=n[s],a=Object.keys(e.metadata[i][o]);void 0==this.metadata[i][o]&&(this.metadata[i][o]=Object.create(null));for(var u=0;u<a.length;u++){var l=a[u];void 0==this.metadata[i][o][l]?this.metadata[i][o][l]=e.metadata[i][o][l]:this.metadata[i][o][l]=this.metadata[i][o][l].concat(e.metadata[i][o][l])}}}},e.MatchData.prototype.add=function(e,t,r){if(!(e in this.metadata))return this.metadata[e]=Object.create(null),void(this.metadata[e][t]=r);if(!(t in this.metadata[e]))return void(this.metadata[e][t]=r);for(var i=Object.keys(r),n=0;n<i.length;n++){var s=i[n];s in this.metadata[e][t]?this.metadata[e][t][s]=this.metadata[e][t][s].concat(r[s]):this.metadata[e][t][s]=r[s]}},e.Query=function(e){this.clauses=[],this.allFields=e},e.Query.wildcard=new String("*"),e.Query.wildcard.NONE=0,e.Query.wildcard.LEADING=1,e.Query.wildcard.TRAILING=2,e.Query.presence={OPTIONAL:1,REQUIRED:2,PROHIBITED:3},e.Query.prototype.clause=function(t){return"fields"in t||(t.fields=this.allFields),"boost"in t||(t.boost=1),"usePipeline"in t||(t.usePipeline=!0),"wildcard"in t||(t.wildcard=e.Query.wildcard.NONE),t.wildcard&e.Query.wildcard.LEADING&&t.term.charAt(0)!=e.Query.wildcard&&(t.term="*"+t.term),t.wildcard&e.Query.wildcard.TRAILING&&t.term.slice(-1)!=e.Query.wildcard&&(t.term=""+t.term+"*"),"presence"in t||(t.presence=e.Query.presence.OPTIONAL),this.clauses.push(t),this},e.Query.prototype.isNegated=function(){for(var t=0;t<this.clauses.length;t++)if(this.clauses[t].presence!=e.Query.presence.PROHIBITED)return!1;return!0},e.Query.prototype.term=function(t,r){if(Array.isArray(t))return t.forEach(function(t){this.term(t,e.utils.clone(r))},this),this;var i=r||{};return i.term=t.toString(),this.clause(i),this},e.QueryParseError=function(e,t,r){this.name="QueryParseError",this.message=e,this.start=t,this.end=r},e.QueryParseError.prototype=new Error,e.QueryLexer=function(e){this.lexemes=[],this.str=e,this.length=e.length,this.pos=0,this.start=0,this.escapeCharPositions=[]},e.QueryLexer.prototype.run=function(){for(var t=e.QueryLexer.lexText;t;)t=t(this)},e.QueryLexer.prototype.sliceString=function(){for(var e=[],t=this.start,r=this.pos,i=0;i<this.escapeCharPositions.length;i++)r=this.escapeCharPositions[i],e.push(this.str.slice(t,r)),t=r+1;return e.push(this.str.slice(t,this.pos)),this.escapeCharPositions.length=0,e.join("")},e.QueryLexer.prototype.emit=function(e){this.lexemes.push({type:e,str:this.sliceString(),start:this.start,end:this.pos}),this.start=this.pos},e.QueryLexer.prototype.escapeCharacter=function(){this.escapeCharPositions.push(this.pos-1),this.pos+=1},e.QueryLexer.prototype.next=function(){if(this.pos>=this.length)return e.QueryLexer.EOS;var t=this.str.charAt(this.pos);return this.pos+=1,t},e.QueryLexer.prototype.width=function(){return this.pos-this.start},e.QueryLexer.prototype.ignore=function(){this.start==this.pos&&(this.pos+=1),this.start=this.pos},e.QueryLexer.prototype.backup=function(){this.pos-=1},e.QueryLexer.prototype.acceptDigitRun=function(){var t,r;do t=this.next(),r=t.charCodeAt(0);while(r>47&&r<58);t!=e.QueryLexer.EOS&&this.backup()},e.QueryLexer.prototype.more=function(){return this.pos<this.length},e.QueryLexer.EOS="EOS",e.QueryLexer.FIELD="FIELD",e.QueryLexer.TERM="TERM",e.QueryLexer.EDIT_DISTANCE="EDIT_DISTANCE",e.QueryLexer.BOOST="BOOST",e.QueryLexer.PRESENCE="PRESENCE",e.QueryLexer.lexField=function(t){return t.backup(),t.emit(e.QueryLexer.FIELD),t.ignore(),e.QueryLexer.lexText},e.QueryLexer.lexTerm=function(t){if(t.width()>1&&(t.backup(),t.emit(e.QueryLexer.TERM)),t.ignore(),t.more())return e.QueryLexer.lexText},e.QueryLexer.lexEditDistance=function(t){return t.ignore(),t.acceptDigitRun(),t.emit(e.QueryLexer.EDIT_DISTANCE),e.QueryLexer.lexText},e.QueryLexer.lexBoost=function(t){return t.ignore(),t.acceptDigitRun(),t.emit(e.QueryLexer.BOOST),e.QueryLexer.lexText},e.QueryLexer.lexEOS=function(t){t.width()>0&&t.emit(e.QueryLexer.TERM)},e.QueryLexer.termSeparator=e.tokenizer.separator,e.QueryLexer.lexText=function(t){for(;;){var r=t.next();if(r==e.QueryLexer.EOS)return e.QueryLexer.lexEOS;if(92!=r.charCodeAt(0)){if(":"==r)return e.QueryLexer.lexField;if("~"==r)return t.backup(),t.width()>0&&t.emit(e.QueryLexer.TERM),e.QueryLexer.lexEditDistance;if("^"==r)return t.backup(),t.width()>0&&t.emit(e.QueryLexer.TERM),e.QueryLexer.lexBoost;if("+"==r&&1===t.width())return t.emit(e.QueryLexer.PRESENCE),e.QueryLexer.lexText;if("-"==r&&1===t.width())return t.emit(e.QueryLexer.PRESENCE),e.QueryLexer.lexText;if(r.match(e.QueryLexer.termSeparator))return e.QueryLexer.lexTerm}else t.escapeCharacter()}},e.QueryParser=function(t,r){this.lexer=new e.QueryLexer(t),this.query=r,this.currentClause={},this.lexemeIdx=0},e.QueryParser.prototype.parse=function(){this.lexer.run(),this.lexemes=this.lexer.lexemes;for(var t=e.QueryParser.parseClause;t;)t=t(this);return this.query},e.QueryParser.prototype.peekLexeme=function(){return this.lexemes[this.lexemeIdx]},e.QueryParser.prototype.consumeLexeme=function(){var e=this.peekLexeme();return this.lexemeIdx+=1,e},e.QueryParser.prototype.nextClause=function(){var e=this.currentClause;this.query.clause(e),this.currentClause={}},e.QueryParser.parseClause=function(t){var r=t.peekLexeme();if(void 0!=r)switch(r.type){case e.QueryLexer.PRESENCE:return e.QueryParser.parsePresence;case e.QueryLexer.FIELD:return e.QueryParser.parseField;case e.QueryLexer.TERM:return e.QueryParser.parseTerm;default:var i="expected either a field or a term, found "+r.type;throw r.str.length>=1&&(i+=" with value '"+r.str+"'"),new e.QueryParseError(i,r.start,r.end)}},e.QueryParser.parsePresence=function(t){var r=t.consumeLexeme();if(void 0!=r){switch(r.str){case"-":t.currentClause.presence=e.Query.presence.PROHIBITED;break;case"+":t.currentClause.presence=e.Query.presence.REQUIRED;break;default:var i="unrecognised presence operator'"+r.str+"'";throw new e.QueryParseError(i,r.start,r.end)}var n=t.peekLexeme();if(void 0==n){var i="expecting term or field, found nothing";throw new e.QueryParseError(i,r.start,r.end)}switch(n.type){case e.QueryLexer.FIELD:return e.QueryParser.parseField;case e.QueryLexer.TERM:return e.QueryParser.parseTerm;default:var i="expecting term or field, found '"+n.type+"'";throw new e.QueryParseError(i,n.start,n.end)}}},e.QueryParser.parseField=function(t){var r=t.consumeLexeme();if(void 0!=r){if(t.query.allFields.indexOf(r.str)==-1){var i=t.query.allFields.map(function(e){return"'"+e+"'"}).join(", "),n="unrecognised field '"+r.str+"', possible fields: "+i;throw new e.QueryParseError(n,r.start,r.end)}t.currentClause.fields=[r.str];var s=t.peekLexeme();if(void 0==s){var n="expecting term, found nothing";throw new e.QueryParseError(n,r.start,r.end)}switch(s.type){case e.QueryLexer.TERM:return e.QueryParser.parseTerm;default:var n="expecting term, found '"+s.type+"'";throw new e.QueryParseError(n,s.start,s.end)}}},e.QueryParser.parseTerm=function(t){var r=t.consumeLexeme();if(void 0!=r){t.currentClause.term=r.str.toLowerCase(),r.str.indexOf("*")!=-1&&(t.currentClause.usePipeline=!1);var i=t.peekLexeme();if(void 0==i)return void t.nextClause();switch(i.type){case e.QueryLexer.TERM:return t.nextClause(),e.QueryParser.parseTerm;case e.QueryLexer.FIELD:return t.nextClause(),e.QueryParser.parseField;case e.QueryLexer.EDIT_DISTANCE:return e.QueryParser.parseEditDistance;case e.QueryLexer.BOOST:return e.QueryParser.parseBoost;case e.QueryLexer.PRESENCE:return t.nextClause(),e.QueryParser.parsePresence;default:var n="Unexpected lexeme type '"+i.type+"'";throw new e.QueryParseError(n,i.start,i.end)}}},e.QueryParser.parseEditDistance=function(t){var r=t.consumeLexeme();if(void 0!=r){var i=parseInt(r.str,10);if(isNaN(i)){var n="edit distance must be numeric";throw new e.QueryParseError(n,r.start,r.end)}t.currentClause.editDistance=i;var s=t.peekLexeme();if(void 0==s)return void t.nextClause();switch(s.type){case e.QueryLexer.TERM:return t.nextClause(),e.QueryParser.parseTerm;case e.QueryLexer.FIELD:return t.nextClause(),e.QueryParser.parseField;case e.QueryLexer.EDIT_DISTANCE:return e.QueryParser.parseEditDistance;case e.QueryLexer.BOOST:return e.QueryParser.parseBoost;case e.QueryLexer.PRESENCE:return t.nextClause(),e.QueryParser.parsePresence;default:var n="Unexpected lexeme type '"+s.type+"'";throw new e.QueryParseError(n,s.start,s.end)}}},e.QueryParser.parseBoost=function(t){var r=t.consumeLexeme();if(void 0!=r){var i=parseInt(r.str,10);if(isNaN(i)){var n="boost must be numeric";throw new e.QueryParseError(n,r.start,r.end)}t.currentClause.boost=i;var s=t.peekLexeme();if(void 0==s)return void t.nextClause();switch(s.type){case e.QueryLexer.TERM:return t.nextClause(),e.QueryParser.parseTerm;case e.QueryLexer.FIELD:return t.nextClause(),e.QueryParser.parseField;case e.QueryLexer.EDIT_DISTANCE:return e.QueryParser.parseEditDistance;case e.QueryLexer.BOOST:return e.QueryParser.parseBoost;case e.QueryLexer.PRESENCE:return t.nextClause(),e.QueryParser.parsePresence;default:var n="Unexpected lexeme type '"+s.type+"'";throw new e.QueryParseError(n,s.start,s.end)}}},function(e,t){"function"==typeof define&&define.amd?define(t):"object"==typeof exports?module.exports=t():e.lunr=t()}(this,function(){return e})}();
+!(function () {
+  var e = function (t) {
+    var r = new e.Builder();
+    return (
+      r.pipeline.add(e.trimmer, e.stopWordFilter, e.stemmer), r.searchPipeline.add(e.stemmer), t.call(r, r), r.build()
+    );
+  };
+  (e.version = '2.3.9'),
+    (e.utils = {}),
+    (e.utils.warn = (function (e) {
+      return function (t) {
+        e.console && console.warn && console.warn(t);
+      };
+    })(this)),
+    (e.utils.asString = function (e) {
+      return void 0 === e || null === e ? '' : e.toString();
+    }),
+    (e.utils.clone = function (e) {
+      if (null === e || void 0 === e) return e;
+      for (var t = Object.create(null), r = Object.keys(e), i = 0; i < r.length; i++) {
+        var n = r[i],
+          s = e[n];
+        if (Array.isArray(s)) t[n] = s.slice();
+        else {
+          if ('string' != typeof s && 'number' != typeof s && 'boolean' != typeof s)
+            throw new TypeError('clone is not deep and does not support nested objects');
+          t[n] = s;
+        }
+      }
+      return t;
+    }),
+    (e.FieldRef = function (e, t, r) {
+      (this.docRef = e), (this.fieldName = t), (this._stringValue = r);
+    }),
+    (e.FieldRef.joiner = '/'),
+    (e.FieldRef.fromString = function (t) {
+      var r = t.indexOf(e.FieldRef.joiner);
+      if (r === -1) throw 'malformed field ref string';
+      var i = t.slice(0, r),
+        n = t.slice(r + 1);
+      return new e.FieldRef(n, i, t);
+    }),
+    (e.FieldRef.prototype.toString = function () {
+      return (
+        void 0 == this._stringValue && (this._stringValue = this.fieldName + e.FieldRef.joiner + this.docRef),
+        this._stringValue
+      );
+    }),
+    (e.Set = function (e) {
+      if (((this.elements = Object.create(null)), e)) {
+        this.length = e.length;
+        for (var t = 0; t < this.length; t++) this.elements[e[t]] = !0;
+      } else this.length = 0;
+    }),
+    (e.Set.complete = {
+      intersect: function (e) {
+        return e;
+      },
+      union: function () {
+        return this;
+      },
+      contains: function () {
+        return !0;
+      }
+    }),
+    (e.Set.empty = {
+      intersect: function () {
+        return this;
+      },
+      union: function (e) {
+        return e;
+      },
+      contains: function () {
+        return !1;
+      }
+    }),
+    (e.Set.prototype.contains = function (e) {
+      return !!this.elements[e];
+    }),
+    (e.Set.prototype.intersect = function (t) {
+      var r,
+        i,
+        n,
+        s = [];
+      if (t === e.Set.complete) return this;
+      if (t === e.Set.empty) return t;
+      this.length < t.length ? ((r = this), (i = t)) : ((r = t), (i = this)), (n = Object.keys(r.elements));
+      for (var o = 0; o < n.length; o++) {
+        var a = n[o];
+        a in i.elements && s.push(a);
+      }
+      return new e.Set(s);
+    }),
+    (e.Set.prototype.union = function (t) {
+      return t === e.Set.complete
+        ? e.Set.complete
+        : t === e.Set.empty
+        ? this
+        : new e.Set(Object.keys(this.elements).concat(Object.keys(t.elements)));
+    }),
+    (e.idf = function (e, t) {
+      var r = 0;
+      for (var i in e) '_index' != i && (r += Object.keys(e[i]).length);
+      var n = (t - r + 0.5) / (r + 0.5);
+      return Math.log(1 + Math.abs(n));
+    }),
+    (e.Token = function (e, t) {
+      (this.str = e || ''), (this.metadata = t || {});
+    }),
+    (e.Token.prototype.toString = function () {
+      return this.str;
+    }),
+    (e.Token.prototype.update = function (e) {
+      return (this.str = e(this.str, this.metadata)), this;
+    }),
+    (e.Token.prototype.clone = function (t) {
+      return (
+        (t =
+          t ||
+          function (e) {
+            return e;
+          }),
+        new e.Token(t(this.str, this.metadata), this.metadata)
+      );
+    }),
+    (e.tokenizer = function (t, r) {
+      if (null == t || void 0 == t) return [];
+      if (Array.isArray(t))
+        return t.map(function (t) {
+          return new e.Token(e.utils.asString(t).toLowerCase(), e.utils.clone(r));
+        });
+      for (var i = t.toString().toLowerCase(), n = i.length, s = [], o = 0, a = 0; o <= n; o++) {
+        var u = i.charAt(o),
+          l = o - a;
+        if (u.match(e.tokenizer.separator) || o == n) {
+          if (l > 0) {
+            var c = e.utils.clone(r) || {};
+            (c.position = [a, l]), (c.index = s.length), s.push(new e.Token(i.slice(a, o), c));
+          }
+          a = o + 1;
+        }
+      }
+      return s;
+    }),
+    (e.tokenizer.separator = /[\s\-]+/),
+    (e.Pipeline = function () {
+      this._stack = [];
+    }),
+    (e.Pipeline.registeredFunctions = Object.create(null)),
+    (e.Pipeline.registerFunction = function (t, r) {
+      r in this.registeredFunctions && e.utils.warn('Overwriting existing registered function: ' + r),
+        (t.label = r),
+        (e.Pipeline.registeredFunctions[t.label] = t);
+    }),
+    (e.Pipeline.warnIfFunctionNotRegistered = function (t) {
+      var r = t.label && t.label in this.registeredFunctions;
+      r ||
+        e.utils.warn(
+          'Function is not registered with pipeline. This may cause problems when serialising the index.\n',
+          t
+        );
+    }),
+    (e.Pipeline.load = function (t) {
+      var r = new e.Pipeline();
+      return (
+        t.forEach(function (t) {
+          var i = e.Pipeline.registeredFunctions[t];
+          if (!i) throw new Error('Cannot load unregistered function: ' + t);
+          r.add(i);
+        }),
+        r
+      );
+    }),
+    (e.Pipeline.prototype.add = function () {
+      var t = Array.prototype.slice.call(arguments);
+      t.forEach(function (t) {
+        e.Pipeline.warnIfFunctionNotRegistered(t), this._stack.push(t);
+      }, this);
+    }),
+    (e.Pipeline.prototype.after = function (t, r) {
+      e.Pipeline.warnIfFunctionNotRegistered(r);
+      var i = this._stack.indexOf(t);
+      if (i == -1) throw new Error('Cannot find existingFn');
+      (i += 1), this._stack.splice(i, 0, r);
+    }),
+    (e.Pipeline.prototype.before = function (t, r) {
+      e.Pipeline.warnIfFunctionNotRegistered(r);
+      var i = this._stack.indexOf(t);
+      if (i == -1) throw new Error('Cannot find existingFn');
+      this._stack.splice(i, 0, r);
+    }),
+    (e.Pipeline.prototype.remove = function (e) {
+      var t = this._stack.indexOf(e);
+      t != -1 && this._stack.splice(t, 1);
+    }),
+    (e.Pipeline.prototype.run = function (e) {
+      for (var t = this._stack.length, r = 0; r < t; r++) {
+        for (var i = this._stack[r], n = [], s = 0; s < e.length; s++) {
+          var o = i(e[s], s, e);
+          if (null !== o && void 0 !== o && '' !== o)
+            if (Array.isArray(o)) for (var a = 0; a < o.length; a++) n.push(o[a]);
+            else n.push(o);
+        }
+        e = n;
+      }
+      return e;
+    }),
+    (e.Pipeline.prototype.runString = function (t, r) {
+      var i = new e.Token(t, r);
+      return this.run([i]).map(function (e) {
+        return e.toString();
+      });
+    }),
+    (e.Pipeline.prototype.reset = function () {
+      this._stack = [];
+    }),
+    (e.Pipeline.prototype.toJSON = function () {
+      return this._stack.map(function (t) {
+        return e.Pipeline.warnIfFunctionNotRegistered(t), t.label;
+      });
+    }),
+    (e.Vector = function (e) {
+      (this._magnitude = 0), (this.elements = e || []);
+    }),
+    (e.Vector.prototype.positionForIndex = function (e) {
+      if (0 == this.elements.length) return 0;
+      for (
+        var t = 0, r = this.elements.length / 2, i = r - t, n = Math.floor(i / 2), s = this.elements[2 * n];
+        i > 1 && (s < e && (t = n), s > e && (r = n), s != e);
+
+      )
+        (i = r - t), (n = t + Math.floor(i / 2)), (s = this.elements[2 * n]);
+      return s == e ? 2 * n : s > e ? 2 * n : s < e ? 2 * (n + 1) : void 0;
+    }),
+    (e.Vector.prototype.insert = function (e, t) {
+      this.upsert(e, t, function () {
+        throw 'duplicate index';
+      });
+    }),
+    (e.Vector.prototype.upsert = function (e, t, r) {
+      this._magnitude = 0;
+      var i = this.positionForIndex(e);
+      this.elements[i] == e ? (this.elements[i + 1] = r(this.elements[i + 1], t)) : this.elements.splice(i, 0, e, t);
+    }),
+    (e.Vector.prototype.magnitude = function () {
+      if (this._magnitude) return this._magnitude;
+      for (var e = 0, t = this.elements.length, r = 1; r < t; r += 2) {
+        var i = this.elements[r];
+        e += i * i;
+      }
+      return (this._magnitude = Math.sqrt(e));
+    }),
+    (e.Vector.prototype.dot = function (e) {
+      for (
+        var t = 0, r = this.elements, i = e.elements, n = r.length, s = i.length, o = 0, a = 0, u = 0, l = 0;
+        u < n && l < s;
+
+      )
+        (o = r[u]),
+          (a = i[l]),
+          o < a ? (u += 2) : o > a ? (l += 2) : o == a && ((t += r[u + 1] * i[l + 1]), (u += 2), (l += 2));
+      return t;
+    }),
+    (e.Vector.prototype.similarity = function (e) {
+      return this.dot(e) / this.magnitude() || 0;
+    }),
+    (e.Vector.prototype.toArray = function () {
+      for (var e = new Array(this.elements.length / 2), t = 1, r = 0; t < this.elements.length; t += 2, r++)
+        e[r] = this.elements[t];
+      return e;
+    }),
+    (e.Vector.prototype.toJSON = function () {
+      return this.elements;
+    }),
+    (e.stemmer = (function () {
+      var e = {
+          ational: 'ate',
+          tional: 'tion',
+          enci: 'ence',
+          anci: 'ance',
+          izer: 'ize',
+          bli: 'ble',
+          alli: 'al',
+          entli: 'ent',
+          eli: 'e',
+          ousli: 'ous',
+          ization: 'ize',
+          ation: 'ate',
+          ator: 'ate',
+          alism: 'al',
+          iveness: 'ive',
+          fulness: 'ful',
+          ousness: 'ous',
+          aliti: 'al',
+          iviti: 'ive',
+          biliti: 'ble',
+          logi: 'log'
+        },
+        t = { icate: 'ic', ative: '', alize: 'al', iciti: 'ic', ical: 'ic', ful: '', ness: '' },
+        r = '[^aeiou]',
+        i = '[aeiouy]',
+        n = r + '[^aeiouy]*',
+        s = i + '[aeiou]*',
+        o = '^(' + n + ')?' + s + n,
+        a = '^(' + n + ')?' + s + n + '(' + s + ')?$',
+        u = '^(' + n + ')?' + s + n + s + n,
+        l = '^(' + n + ')?' + i,
+        c = new RegExp(o),
+        h = new RegExp(u),
+        d = new RegExp(a),
+        f = new RegExp(l),
+        p = /^(.+?)(ss|i)es$/,
+        y = /^(.+?)([^s])s$/,
+        m = /^(.+?)eed$/,
+        v = /^(.+?)(ed|ing)$/,
+        g = /.$/,
+        x = /(at|bl|iz)$/,
+        w = new RegExp('([^aeiouylsz])\\1$'),
+        Q = new RegExp('^' + n + i + '[^aeiouwxy]$'),
+        k = /^(.+?[^aeiou])y$/,
+        S = /^(.+?)(ational|tional|enci|anci|izer|bli|alli|entli|eli|ousli|ization|ation|ator|alism|iveness|fulness|ousness|aliti|iviti|biliti|logi)$/,
+        E = /^(.+?)(icate|ative|alize|iciti|ical|ful|ness)$/,
+        L = /^(.+?)(al|ance|ence|er|ic|able|ible|ant|ement|ment|ent|ou|ism|ate|iti|ous|ive|ize)$/,
+        b = /^(.+?)(s|t)(ion)$/,
+        P = /^(.+?)e$/,
+        T = /ll$/,
+        O = new RegExp('^' + n + i + '[^aeiouwxy]$'),
+        I = function (r) {
+          var i, n, s, o, a, u, l;
+          if (r.length < 3) return r;
+          if (
+            ((s = r.substr(0, 1)),
+            'y' == s && (r = s.toUpperCase() + r.substr(1)),
+            (o = p),
+            (a = y),
+            o.test(r) ? (r = r.replace(o, '$1$2')) : a.test(r) && (r = r.replace(a, '$1$2')),
+            (o = m),
+            (a = v),
+            o.test(r))
+          ) {
+            var I = o.exec(r);
+            (o = c), o.test(I[1]) && ((o = g), (r = r.replace(o, '')));
+          } else if (a.test(r)) {
+            var I = a.exec(r);
+            (i = I[1]),
+              (a = f),
+              a.test(i) &&
+                ((r = i),
+                (a = x),
+                (u = w),
+                (l = Q),
+                a.test(r) ? (r += 'e') : u.test(r) ? ((o = g), (r = r.replace(o, ''))) : l.test(r) && (r += 'e'));
+          }
+          if (((o = k), o.test(r))) {
+            var I = o.exec(r);
+            (i = I[1]), (r = i + 'i');
+          }
+          if (((o = S), o.test(r))) {
+            var I = o.exec(r);
+            (i = I[1]), (n = I[2]), (o = c), o.test(i) && (r = i + e[n]);
+          }
+          if (((o = E), o.test(r))) {
+            var I = o.exec(r);
+            (i = I[1]), (n = I[2]), (o = c), o.test(i) && (r = i + t[n]);
+          }
+          if (((o = L), (a = b), o.test(r))) {
+            var I = o.exec(r);
+            (i = I[1]), (o = h), o.test(i) && (r = i);
+          } else if (a.test(r)) {
+            var I = a.exec(r);
+            (i = I[1] + I[2]), (a = h), a.test(i) && (r = i);
+          }
+          if (((o = P), o.test(r))) {
+            var I = o.exec(r);
+            (i = I[1]), (o = h), (a = d), (u = O), (o.test(i) || (a.test(i) && !u.test(i))) && (r = i);
+          }
+          return (
+            (o = T),
+            (a = h),
+            o.test(r) && a.test(r) && ((o = g), (r = r.replace(o, ''))),
+            'y' == s && (r = s.toLowerCase() + r.substr(1)),
+            r
+          );
+        };
+      return function (e) {
+        return e.update(I);
+      };
+    })()),
+    e.Pipeline.registerFunction(e.stemmer, 'stemmer'),
+    (e.generateStopWordFilter = function (e) {
+      var t = e.reduce(function (e, t) {
+        return (e[t] = t), e;
+      }, {});
+      return function (e) {
+        if (e && t[e.toString()] !== e.toString()) return e;
+      };
+    }),
+    (e.stopWordFilter = e.generateStopWordFilter([
+      'a',
+      'able',
+      'about',
+      'across',
+      'after',
+      'all',
+      'almost',
+      'also',
+      'am',
+      'among',
+      'an',
+      'and',
+      'any',
+      'are',
+      'as',
+      'at',
+      'be',
+      'because',
+      'been',
+      'but',
+      'by',
+      'can',
+      'cannot',
+      'could',
+      'dear',
+      'did',
+      'do',
+      'does',
+      'either',
+      'else',
+      'ever',
+      'every',
+      'for',
+      'from',
+      'get',
+      'got',
+      'had',
+      'has',
+      'have',
+      'he',
+      'her',
+      'hers',
+      'him',
+      'his',
+      'how',
+      'however',
+      'i',
+      'if',
+      'in',
+      'into',
+      'is',
+      'it',
+      'its',
+      'just',
+      'least',
+      'let',
+      'like',
+      'likely',
+      'may',
+      'me',
+      'might',
+      'most',
+      'must',
+      'my',
+      'neither',
+      'no',
+      'nor',
+      'not',
+      'of',
+      'off',
+      'often',
+      'on',
+      'only',
+      'or',
+      'other',
+      'our',
+      'own',
+      'rather',
+      'said',
+      'say',
+      'says',
+      'she',
+      'should',
+      'since',
+      'so',
+      'some',
+      'than',
+      'that',
+      'the',
+      'their',
+      'them',
+      'then',
+      'there',
+      'these',
+      'they',
+      'this',
+      'tis',
+      'to',
+      'too',
+      'twas',
+      'us',
+      'wants',
+      'was',
+      'we',
+      'were',
+      'what',
+      'when',
+      'where',
+      'which',
+      'while',
+      'who',
+      'whom',
+      'why',
+      'will',
+      'with',
+      'would',
+      'yet',
+      'you',
+      'your'
+    ])),
+    e.Pipeline.registerFunction(e.stopWordFilter, 'stopWordFilter'),
+    (e.trimmer = function (e) {
+      return e.update(function (e) {
+        return e.replace(/^\W+/, '').replace(/\W+$/, '');
+      });
+    }),
+    e.Pipeline.registerFunction(e.trimmer, 'trimmer'),
+    (e.TokenSet = function () {
+      (this['final'] = !1), (this.edges = {}), (this.id = e.TokenSet._nextId), (e.TokenSet._nextId += 1);
+    }),
+    (e.TokenSet._nextId = 1),
+    (e.TokenSet.fromArray = function (t) {
+      for (var r = new e.TokenSet.Builder(), i = 0, n = t.length; i < n; i++) r.insert(t[i]);
+      return r.finish(), r.root;
+    }),
+    (e.TokenSet.fromClause = function (t) {
+      return 'editDistance' in t ? e.TokenSet.fromFuzzyString(t.term, t.editDistance) : e.TokenSet.fromString(t.term);
+    }),
+    (e.TokenSet.fromFuzzyString = function (t, r) {
+      for (var i = new e.TokenSet(), n = [{ node: i, editsRemaining: r, str: t }]; n.length; ) {
+        var s = n.pop();
+        if (s.str.length > 0) {
+          var o,
+            a = s.str.charAt(0);
+          a in s.node.edges ? (o = s.node.edges[a]) : ((o = new e.TokenSet()), (s.node.edges[a] = o)),
+            1 == s.str.length && (o['final'] = !0),
+            n.push({ node: o, editsRemaining: s.editsRemaining, str: s.str.slice(1) });
+        }
+        if (0 != s.editsRemaining) {
+          if ('*' in s.node.edges) var u = s.node.edges['*'];
+          else {
+            var u = new e.TokenSet();
+            s.node.edges['*'] = u;
+          }
+          if (
+            (0 == s.str.length && (u['final'] = !0),
+            n.push({ node: u, editsRemaining: s.editsRemaining - 1, str: s.str }),
+            s.str.length > 1 && n.push({ node: s.node, editsRemaining: s.editsRemaining - 1, str: s.str.slice(1) }),
+            1 == s.str.length && (s.node['final'] = !0),
+            s.str.length >= 1)
+          ) {
+            if ('*' in s.node.edges) var l = s.node.edges['*'];
+            else {
+              var l = new e.TokenSet();
+              s.node.edges['*'] = l;
+            }
+            1 == s.str.length && (l['final'] = !0),
+              n.push({ node: l, editsRemaining: s.editsRemaining - 1, str: s.str.slice(1) });
+          }
+          if (s.str.length > 1) {
+            var c,
+              h = s.str.charAt(0),
+              d = s.str.charAt(1);
+            d in s.node.edges ? (c = s.node.edges[d]) : ((c = new e.TokenSet()), (s.node.edges[d] = c)),
+              1 == s.str.length && (c['final'] = !0),
+              n.push({ node: c, editsRemaining: s.editsRemaining - 1, str: h + s.str.slice(2) });
+          }
+        }
+      }
+      return i;
+    }),
+    (e.TokenSet.fromString = function (t) {
+      for (var r = new e.TokenSet(), i = r, n = 0, s = t.length; n < s; n++) {
+        var o = t[n],
+          a = n == s - 1;
+        if ('*' == o) (r.edges[o] = r), (r['final'] = a);
+        else {
+          var u = new e.TokenSet();
+          (u['final'] = a), (r.edges[o] = u), (r = u);
+        }
+      }
+      return i;
+    }),
+    (e.TokenSet.prototype.toArray = function () {
+      for (var e = [], t = [{ prefix: '', node: this }]; t.length; ) {
+        var r = t.pop(),
+          i = Object.keys(r.node.edges),
+          n = i.length;
+        r.node['final'] && (r.prefix.charAt(0), e.push(r.prefix));
+        for (var s = 0; s < n; s++) {
+          var o = i[s];
+          t.push({ prefix: r.prefix.concat(o), node: r.node.edges[o] });
+        }
+      }
+      return e;
+    }),
+    (e.TokenSet.prototype.toString = function () {
+      if (this._str) return this._str;
+      for (var e = this['final'] ? '1' : '0', t = Object.keys(this.edges).sort(), r = t.length, i = 0; i < r; i++) {
+        var n = t[i],
+          s = this.edges[n];
+        e = e + n + s.id;
+      }
+      return e;
+    }),
+    (e.TokenSet.prototype.intersect = function (t) {
+      for (var r = new e.TokenSet(), i = void 0, n = [{ qNode: t, output: r, node: this }]; n.length; ) {
+        i = n.pop();
+        for (
+          var s = Object.keys(i.qNode.edges), o = s.length, a = Object.keys(i.node.edges), u = a.length, l = 0;
+          l < o;
+          l++
+        )
+          for (var c = s[l], h = 0; h < u; h++) {
+            var d = a[h];
+            if (d == c || '*' == c) {
+              var f = i.node.edges[d],
+                p = i.qNode.edges[c],
+                y = f['final'] && p['final'],
+                m = void 0;
+              d in i.output.edges
+                ? ((m = i.output.edges[d]), (m['final'] = m['final'] || y))
+                : ((m = new e.TokenSet()), (m['final'] = y), (i.output.edges[d] = m)),
+                n.push({ qNode: p, output: m, node: f });
+            }
+          }
+      }
+      return r;
+    }),
+    (e.TokenSet.Builder = function () {
+      (this.previousWord = ''), (this.root = new e.TokenSet()), (this.uncheckedNodes = []), (this.minimizedNodes = {});
+    }),
+    (e.TokenSet.Builder.prototype.insert = function (t) {
+      var r,
+        i = 0;
+      if (t < this.previousWord) throw new Error('Out of order word insertion');
+      for (var n = 0; n < t.length && n < this.previousWord.length && t[n] == this.previousWord[n]; n++) i++;
+      this.minimize(i),
+        (r = 0 == this.uncheckedNodes.length ? this.root : this.uncheckedNodes[this.uncheckedNodes.length - 1].child);
+      for (var n = i; n < t.length; n++) {
+        var s = new e.TokenSet(),
+          o = t[n];
+        (r.edges[o] = s), this.uncheckedNodes.push({ parent: r, char: o, child: s }), (r = s);
+      }
+      (r['final'] = !0), (this.previousWord = t);
+    }),
+    (e.TokenSet.Builder.prototype.finish = function () {
+      this.minimize(0);
+    }),
+    (e.TokenSet.Builder.prototype.minimize = function (e) {
+      for (var t = this.uncheckedNodes.length - 1; t >= e; t--) {
+        var r = this.uncheckedNodes[t],
+          i = r.child.toString();
+        i in this.minimizedNodes
+          ? (r.parent.edges[r['char']] = this.minimizedNodes[i])
+          : ((r.child._str = i), (this.minimizedNodes[i] = r.child)),
+          this.uncheckedNodes.pop();
+      }
+    }),
+    (e.Index = function (e) {
+      (this.invertedIndex = e.invertedIndex),
+        (this.fieldVectors = e.fieldVectors),
+        (this.tokenSet = e.tokenSet),
+        (this.fields = e.fields),
+        (this.pipeline = e.pipeline);
+    }),
+    (e.Index.prototype.search = function (t) {
+      return this.query(function (r) {
+        var i = new e.QueryParser(t, r);
+        i.parse();
+      });
+    }),
+    (e.Index.prototype.query = function (t) {
+      for (
+        var r = new e.Query(this.fields),
+          i = Object.create(null),
+          n = Object.create(null),
+          s = Object.create(null),
+          o = Object.create(null),
+          a = Object.create(null),
+          u = 0;
+        u < this.fields.length;
+        u++
+      )
+        n[this.fields[u]] = new e.Vector();
+      t.call(r, r);
+      for (var u = 0; u < r.clauses.length; u++) {
+        var l = r.clauses[u],
+          c = null,
+          h = e.Set.empty;
+        c = l.usePipeline ? this.pipeline.runString(l.term, { fields: l.fields }) : [l.term];
+        for (var d = 0; d < c.length; d++) {
+          var f = c[d];
+          l.term = f;
+          var p = e.TokenSet.fromClause(l),
+            y = this.tokenSet.intersect(p).toArray();
+          if (0 === y.length && l.presence === e.Query.presence.REQUIRED) {
+            for (var m = 0; m < l.fields.length; m++) {
+              var v = l.fields[m];
+              o[v] = e.Set.empty;
+            }
+            break;
+          }
+          for (var g = 0; g < y.length; g++)
+            for (var x = y[g], w = this.invertedIndex[x], Q = w._index, m = 0; m < l.fields.length; m++) {
+              var v = l.fields[m],
+                k = w[v],
+                S = Object.keys(k),
+                E = x + '/' + v,
+                L = new e.Set(S);
+              if (
+                (l.presence == e.Query.presence.REQUIRED &&
+                  ((h = h.union(L)), void 0 === o[v] && (o[v] = e.Set.complete)),
+                l.presence != e.Query.presence.PROHIBITED)
+              ) {
+                if (
+                  (n[v].upsert(Q, l.boost, function (e, t) {
+                    return e + t;
+                  }),
+                  !s[E])
+                ) {
+                  for (var b = 0; b < S.length; b++) {
+                    var P,
+                      T = S[b],
+                      O = new e.FieldRef(T, v),
+                      I = k[T];
+                    void 0 === (P = i[O]) ? (i[O] = new e.MatchData(x, v, I)) : P.add(x, v, I);
+                  }
+                  s[E] = !0;
+                }
+              } else void 0 === a[v] && (a[v] = e.Set.empty), (a[v] = a[v].union(L));
+            }
+        }
+        if (l.presence === e.Query.presence.REQUIRED)
+          for (var m = 0; m < l.fields.length; m++) {
+            var v = l.fields[m];
+            o[v] = o[v].intersect(h);
+          }
+      }
+      for (var R = e.Set.complete, F = e.Set.empty, u = 0; u < this.fields.length; u++) {
+        var v = this.fields[u];
+        o[v] && (R = R.intersect(o[v])), a[v] && (F = F.union(a[v]));
+      }
+      var C = Object.keys(i),
+        N = [],
+        _ = Object.create(null);
+      if (r.isNegated()) {
+        C = Object.keys(this.fieldVectors);
+        for (var u = 0; u < C.length; u++) {
+          var O = C[u],
+            j = e.FieldRef.fromString(O);
+          i[O] = new e.MatchData();
+        }
+      }
+      for (var u = 0; u < C.length; u++) {
+        var j = e.FieldRef.fromString(C[u]),
+          D = j.docRef;
+        if (R.contains(D) && !F.contains(D)) {
+          var A,
+            B = this.fieldVectors[j],
+            V = n[j.fieldName].similarity(B);
+          if (void 0 !== (A = _[D])) (A.score += V), A.matchData.combine(i[j]);
+          else {
+            var z = { ref: D, score: V, matchData: i[j] };
+            (_[D] = z), N.push(z);
+          }
+        }
+      }
+      return N.sort(function (e, t) {
+        return t.score - e.score;
+      });
+    }),
+    (e.Index.prototype.toJSON = function () {
+      var t = Object.keys(this.invertedIndex)
+          .sort()
+          .map(function (e) {
+            return [e, this.invertedIndex[e]];
+          }, this),
+        r = Object.keys(this.fieldVectors).map(function (e) {
+          return [e, this.fieldVectors[e].toJSON()];
+        }, this);
+      return {
+        version: e.version,
+        fields: this.fields,
+        fieldVectors: r,
+        invertedIndex: t,
+        pipeline: this.pipeline.toJSON()
+      };
+    }),
+    (e.Index.load = function (t) {
+      var r = {},
+        i = {},
+        n = t.fieldVectors,
+        s = Object.create(null),
+        o = t.invertedIndex,
+        a = new e.TokenSet.Builder(),
+        u = e.Pipeline.load(t.pipeline);
+      t.version != e.version &&
+        e.utils.warn(
+          "Version mismatch when loading serialised index. Current version of lunr '" +
+            e.version +
+            "' does not match serialized index '" +
+            t.version +
+            "'"
+        );
+      for (var l = 0; l < n.length; l++) {
+        var c = n[l],
+          h = c[0],
+          d = c[1];
+        i[h] = new e.Vector(d);
+      }
+      for (var l = 0; l < o.length; l++) {
+        var c = o[l],
+          f = c[0],
+          p = c[1];
+        a.insert(f), (s[f] = p);
+      }
+      return (
+        a.finish(),
+        (r.fields = t.fields),
+        (r.fieldVectors = i),
+        (r.invertedIndex = s),
+        (r.tokenSet = a.root),
+        (r.pipeline = u),
+        new e.Index(r)
+      );
+    }),
+    (e.Builder = function () {
+      (this._ref = 'id'),
+        (this._fields = Object.create(null)),
+        (this._documents = Object.create(null)),
+        (this.invertedIndex = Object.create(null)),
+        (this.fieldTermFrequencies = {}),
+        (this.fieldLengths = {}),
+        (this.tokenizer = e.tokenizer),
+        (this.pipeline = new e.Pipeline()),
+        (this.searchPipeline = new e.Pipeline()),
+        (this.documentCount = 0),
+        (this._b = 0.75),
+        (this._k1 = 1.2),
+        (this.termIndex = 0),
+        (this.metadataWhitelist = []);
+    }),
+    (e.Builder.prototype.ref = function (e) {
+      this._ref = e;
+    }),
+    (e.Builder.prototype.field = function (e, t) {
+      if (/\//.test(e)) throw new RangeError("Field '" + e + "' contains illegal character '/'");
+      this._fields[e] = t || {};
+    }),
+    (e.Builder.prototype.b = function (e) {
+      e < 0 ? (this._b = 0) : e > 1 ? (this._b = 1) : (this._b = e);
+    }),
+    (e.Builder.prototype.k1 = function (e) {
+      this._k1 = e;
+    }),
+    (e.Builder.prototype.add = function (t, r) {
+      var i = t[this._ref],
+        n = Object.keys(this._fields);
+      (this._documents[i] = r || {}), (this.documentCount += 1);
+      for (var s = 0; s < n.length; s++) {
+        var o = n[s],
+          a = this._fields[o].extractor,
+          u = a ? a(t) : t[o],
+          l = this.tokenizer(u, { fields: [o] }),
+          c = this.pipeline.run(l),
+          h = new e.FieldRef(i, o),
+          d = Object.create(null);
+        (this.fieldTermFrequencies[h] = d), (this.fieldLengths[h] = 0), (this.fieldLengths[h] += c.length);
+        for (var f = 0; f < c.length; f++) {
+          var p = c[f];
+          if ((void 0 == d[p] && (d[p] = 0), (d[p] += 1), void 0 == this.invertedIndex[p])) {
+            var y = Object.create(null);
+            (y._index = this.termIndex), (this.termIndex += 1);
+            for (var m = 0; m < n.length; m++) y[n[m]] = Object.create(null);
+            this.invertedIndex[p] = y;
+          }
+          void 0 == this.invertedIndex[p][o][i] && (this.invertedIndex[p][o][i] = Object.create(null));
+          for (var v = 0; v < this.metadataWhitelist.length; v++) {
+            var g = this.metadataWhitelist[v],
+              x = p.metadata[g];
+            void 0 == this.invertedIndex[p][o][i][g] && (this.invertedIndex[p][o][i][g] = []),
+              this.invertedIndex[p][o][i][g].push(x);
+          }
+        }
+      }
+    }),
+    (e.Builder.prototype.calculateAverageFieldLengths = function () {
+      for (var t = Object.keys(this.fieldLengths), r = t.length, i = {}, n = {}, s = 0; s < r; s++) {
+        var o = e.FieldRef.fromString(t[s]),
+          a = o.fieldName;
+        n[a] || (n[a] = 0), (n[a] += 1), i[a] || (i[a] = 0), (i[a] += this.fieldLengths[o]);
+      }
+      for (var u = Object.keys(this._fields), s = 0; s < u.length; s++) {
+        var l = u[s];
+        i[l] = i[l] / n[l];
+      }
+      this.averageFieldLength = i;
+    }),
+    (e.Builder.prototype.createFieldVectors = function () {
+      for (
+        var t = {}, r = Object.keys(this.fieldTermFrequencies), i = r.length, n = Object.create(null), s = 0;
+        s < i;
+        s++
+      ) {
+        for (
+          var o = e.FieldRef.fromString(r[s]),
+            a = o.fieldName,
+            u = this.fieldLengths[o],
+            l = new e.Vector(),
+            c = this.fieldTermFrequencies[o],
+            h = Object.keys(c),
+            d = h.length,
+            f = this._fields[a].boost || 1,
+            p = this._documents[o.docRef].boost || 1,
+            y = 0;
+          y < d;
+          y++
+        ) {
+          var m,
+            v,
+            g,
+            x = h[y],
+            w = c[x],
+            Q = this.invertedIndex[x]._index;
+          void 0 === n[x] ? ((m = e.idf(this.invertedIndex[x], this.documentCount)), (n[x] = m)) : (m = n[x]),
+            (v =
+              (m * ((this._k1 + 1) * w)) / (this._k1 * (1 - this._b + this._b * (u / this.averageFieldLength[a])) + w)),
+            (v *= f),
+            (v *= p),
+            (g = Math.round(1e3 * v) / 1e3),
+            l.insert(Q, g);
+        }
+        t[o] = l;
+      }
+      this.fieldVectors = t;
+    }),
+    (e.Builder.prototype.createTokenSet = function () {
+      this.tokenSet = e.TokenSet.fromArray(Object.keys(this.invertedIndex).sort());
+    }),
+    (e.Builder.prototype.build = function () {
+      return (
+        this.calculateAverageFieldLengths(),
+        this.createFieldVectors(),
+        this.createTokenSet(),
+        new e.Index({
+          invertedIndex: this.invertedIndex,
+          fieldVectors: this.fieldVectors,
+          tokenSet: this.tokenSet,
+          fields: Object.keys(this._fields),
+          pipeline: this.searchPipeline
+        })
+      );
+    }),
+    (e.Builder.prototype.use = function (e) {
+      var t = Array.prototype.slice.call(arguments, 1);
+      t.unshift(this), e.apply(this, t);
+    }),
+    (e.MatchData = function (e, t, r) {
+      for (var i = Object.create(null), n = Object.keys(r || {}), s = 0; s < n.length; s++) {
+        var o = n[s];
+        i[o] = r[o].slice();
+      }
+      (this.metadata = Object.create(null)),
+        void 0 !== e && ((this.metadata[e] = Object.create(null)), (this.metadata[e][t] = i));
+    }),
+    (e.MatchData.prototype.combine = function (e) {
+      for (var t = Object.keys(e.metadata), r = 0; r < t.length; r++) {
+        var i = t[r],
+          n = Object.keys(e.metadata[i]);
+        void 0 == this.metadata[i] && (this.metadata[i] = Object.create(null));
+        for (var s = 0; s < n.length; s++) {
+          var o = n[s],
+            a = Object.keys(e.metadata[i][o]);
+          void 0 == this.metadata[i][o] && (this.metadata[i][o] = Object.create(null));
+          for (var u = 0; u < a.length; u++) {
+            var l = a[u];
+            void 0 == this.metadata[i][o][l]
+              ? (this.metadata[i][o][l] = e.metadata[i][o][l])
+              : (this.metadata[i][o][l] = this.metadata[i][o][l].concat(e.metadata[i][o][l]));
+          }
+        }
+      }
+    }),
+    (e.MatchData.prototype.add = function (e, t, r) {
+      if (!(e in this.metadata)) return (this.metadata[e] = Object.create(null)), void (this.metadata[e][t] = r);
+      if (!(t in this.metadata[e])) return void (this.metadata[e][t] = r);
+      for (var i = Object.keys(r), n = 0; n < i.length; n++) {
+        var s = i[n];
+        s in this.metadata[e][t]
+          ? (this.metadata[e][t][s] = this.metadata[e][t][s].concat(r[s]))
+          : (this.metadata[e][t][s] = r[s]);
+      }
+    }),
+    (e.Query = function (e) {
+      (this.clauses = []), (this.allFields = e);
+    }),
+    (e.Query.wildcard = new String('*')),
+    (e.Query.wildcard.NONE = 0),
+    (e.Query.wildcard.LEADING = 1),
+    (e.Query.wildcard.TRAILING = 2),
+    (e.Query.presence = { OPTIONAL: 1, REQUIRED: 2, PROHIBITED: 3 }),
+    (e.Query.prototype.clause = function (t) {
+      return (
+        'fields' in t || (t.fields = this.allFields),
+        'boost' in t || (t.boost = 1),
+        'usePipeline' in t || (t.usePipeline = !0),
+        'wildcard' in t || (t.wildcard = e.Query.wildcard.NONE),
+        t.wildcard & e.Query.wildcard.LEADING && t.term.charAt(0) != e.Query.wildcard && (t.term = '*' + t.term),
+        t.wildcard & e.Query.wildcard.TRAILING && t.term.slice(-1) != e.Query.wildcard && (t.term = '' + t.term + '*'),
+        'presence' in t || (t.presence = e.Query.presence.OPTIONAL),
+        this.clauses.push(t),
+        this
+      );
+    }),
+    (e.Query.prototype.isNegated = function () {
+      for (var t = 0; t < this.clauses.length; t++)
+        if (this.clauses[t].presence != e.Query.presence.PROHIBITED) return !1;
+      return !0;
+    }),
+    (e.Query.prototype.term = function (t, r) {
+      if (Array.isArray(t))
+        return (
+          t.forEach(function (t) {
+            this.term(t, e.utils.clone(r));
+          }, this),
+          this
+        );
+      var i = r || {};
+      return (i.term = t.toString()), this.clause(i), this;
+    }),
+    (e.QueryParseError = function (e, t, r) {
+      (this.name = 'QueryParseError'), (this.message = e), (this.start = t), (this.end = r);
+    }),
+    (e.QueryParseError.prototype = new Error()),
+    (e.QueryLexer = function (e) {
+      (this.lexemes = []),
+        (this.str = e),
+        (this.length = e.length),
+        (this.pos = 0),
+        (this.start = 0),
+        (this.escapeCharPositions = []);
+    }),
+    (e.QueryLexer.prototype.run = function () {
+      for (var t = e.QueryLexer.lexText; t; ) t = t(this);
+    }),
+    (e.QueryLexer.prototype.sliceString = function () {
+      for (var e = [], t = this.start, r = this.pos, i = 0; i < this.escapeCharPositions.length; i++)
+        (r = this.escapeCharPositions[i]), e.push(this.str.slice(t, r)), (t = r + 1);
+      return e.push(this.str.slice(t, this.pos)), (this.escapeCharPositions.length = 0), e.join('');
+    }),
+    (e.QueryLexer.prototype.emit = function (e) {
+      this.lexemes.push({ type: e, str: this.sliceString(), start: this.start, end: this.pos }),
+        (this.start = this.pos);
+    }),
+    (e.QueryLexer.prototype.escapeCharacter = function () {
+      this.escapeCharPositions.push(this.pos - 1), (this.pos += 1);
+    }),
+    (e.QueryLexer.prototype.next = function () {
+      if (this.pos >= this.length) return e.QueryLexer.EOS;
+      var t = this.str.charAt(this.pos);
+      return (this.pos += 1), t;
+    }),
+    (e.QueryLexer.prototype.width = function () {
+      return this.pos - this.start;
+    }),
+    (e.QueryLexer.prototype.ignore = function () {
+      this.start == this.pos && (this.pos += 1), (this.start = this.pos);
+    }),
+    (e.QueryLexer.prototype.backup = function () {
+      this.pos -= 1;
+    }),
+    (e.QueryLexer.prototype.acceptDigitRun = function () {
+      var t, r;
+      do (t = this.next()), (r = t.charCodeAt(0));
+      while (r > 47 && r < 58);
+      t != e.QueryLexer.EOS && this.backup();
+    }),
+    (e.QueryLexer.prototype.more = function () {
+      return this.pos < this.length;
+    }),
+    (e.QueryLexer.EOS = 'EOS'),
+    (e.QueryLexer.FIELD = 'FIELD'),
+    (e.QueryLexer.TERM = 'TERM'),
+    (e.QueryLexer.EDIT_DISTANCE = 'EDIT_DISTANCE'),
+    (e.QueryLexer.BOOST = 'BOOST'),
+    (e.QueryLexer.PRESENCE = 'PRESENCE'),
+    (e.QueryLexer.lexField = function (t) {
+      return t.backup(), t.emit(e.QueryLexer.FIELD), t.ignore(), e.QueryLexer.lexText;
+    }),
+    (e.QueryLexer.lexTerm = function (t) {
+      if ((t.width() > 1 && (t.backup(), t.emit(e.QueryLexer.TERM)), t.ignore(), t.more())) return e.QueryLexer.lexText;
+    }),
+    (e.QueryLexer.lexEditDistance = function (t) {
+      return t.ignore(), t.acceptDigitRun(), t.emit(e.QueryLexer.EDIT_DISTANCE), e.QueryLexer.lexText;
+    }),
+    (e.QueryLexer.lexBoost = function (t) {
+      return t.ignore(), t.acceptDigitRun(), t.emit(e.QueryLexer.BOOST), e.QueryLexer.lexText;
+    }),
+    (e.QueryLexer.lexEOS = function (t) {
+      t.width() > 0 && t.emit(e.QueryLexer.TERM);
+    }),
+    (e.QueryLexer.termSeparator = e.tokenizer.separator),
+    (e.QueryLexer.lexText = function (t) {
+      for (;;) {
+        var r = t.next();
+        if (r == e.QueryLexer.EOS) return e.QueryLexer.lexEOS;
+        if (92 != r.charCodeAt(0)) {
+          if (':' == r) return e.QueryLexer.lexField;
+          if ('~' == r) return t.backup(), t.width() > 0 && t.emit(e.QueryLexer.TERM), e.QueryLexer.lexEditDistance;
+          if ('^' == r) return t.backup(), t.width() > 0 && t.emit(e.QueryLexer.TERM), e.QueryLexer.lexBoost;
+          if ('+' == r && 1 === t.width()) return t.emit(e.QueryLexer.PRESENCE), e.QueryLexer.lexText;
+          if ('-' == r && 1 === t.width()) return t.emit(e.QueryLexer.PRESENCE), e.QueryLexer.lexText;
+          if (r.match(e.QueryLexer.termSeparator)) return e.QueryLexer.lexTerm;
+        } else t.escapeCharacter();
+      }
+    }),
+    (e.QueryParser = function (t, r) {
+      (this.lexer = new e.QueryLexer(t)), (this.query = r), (this.currentClause = {}), (this.lexemeIdx = 0);
+    }),
+    (e.QueryParser.prototype.parse = function () {
+      this.lexer.run(), (this.lexemes = this.lexer.lexemes);
+      for (var t = e.QueryParser.parseClause; t; ) t = t(this);
+      return this.query;
+    }),
+    (e.QueryParser.prototype.peekLexeme = function () {
+      return this.lexemes[this.lexemeIdx];
+    }),
+    (e.QueryParser.prototype.consumeLexeme = function () {
+      var e = this.peekLexeme();
+      return (this.lexemeIdx += 1), e;
+    }),
+    (e.QueryParser.prototype.nextClause = function () {
+      var e = this.currentClause;
+      this.query.clause(e), (this.currentClause = {});
+    }),
+    (e.QueryParser.parseClause = function (t) {
+      var r = t.peekLexeme();
+      if (void 0 != r)
+        switch (r.type) {
+          case e.QueryLexer.PRESENCE:
+            return e.QueryParser.parsePresence;
+          case e.QueryLexer.FIELD:
+            return e.QueryParser.parseField;
+          case e.QueryLexer.TERM:
+            return e.QueryParser.parseTerm;
+          default:
+            var i = 'expected either a field or a term, found ' + r.type;
+            throw (r.str.length >= 1 && (i += " with value '" + r.str + "'"), new e.QueryParseError(i, r.start, r.end));
+        }
+    }),
+    (e.QueryParser.parsePresence = function (t) {
+      var r = t.consumeLexeme();
+      if (void 0 != r) {
+        switch (r.str) {
+          case '-':
+            t.currentClause.presence = e.Query.presence.PROHIBITED;
+            break;
+          case '+':
+            t.currentClause.presence = e.Query.presence.REQUIRED;
+            break;
+          default:
+            var i = "unrecognised presence operator'" + r.str + "'";
+            throw new e.QueryParseError(i, r.start, r.end);
+        }
+        var n = t.peekLexeme();
+        if (void 0 == n) {
+          var i = 'expecting term or field, found nothing';
+          throw new e.QueryParseError(i, r.start, r.end);
+        }
+        switch (n.type) {
+          case e.QueryLexer.FIELD:
+            return e.QueryParser.parseField;
+          case e.QueryLexer.TERM:
+            return e.QueryParser.parseTerm;
+          default:
+            var i = "expecting term or field, found '" + n.type + "'";
+            throw new e.QueryParseError(i, n.start, n.end);
+        }
+      }
+    }),
+    (e.QueryParser.parseField = function (t) {
+      var r = t.consumeLexeme();
+      if (void 0 != r) {
+        if (t.query.allFields.indexOf(r.str) == -1) {
+          var i = t.query.allFields
+              .map(function (e) {
+                return "'" + e + "'";
+              })
+              .join(', '),
+            n = "unrecognised field '" + r.str + "', possible fields: " + i;
+          throw new e.QueryParseError(n, r.start, r.end);
+        }
+        t.currentClause.fields = [r.str];
+        var s = t.peekLexeme();
+        if (void 0 == s) {
+          var n = 'expecting term, found nothing';
+          throw new e.QueryParseError(n, r.start, r.end);
+        }
+        switch (s.type) {
+          case e.QueryLexer.TERM:
+            return e.QueryParser.parseTerm;
+          default:
+            var n = "expecting term, found '" + s.type + "'";
+            throw new e.QueryParseError(n, s.start, s.end);
+        }
+      }
+    }),
+    (e.QueryParser.parseTerm = function (t) {
+      var r = t.consumeLexeme();
+      if (void 0 != r) {
+        (t.currentClause.term = r.str.toLowerCase()), r.str.indexOf('*') != -1 && (t.currentClause.usePipeline = !1);
+        var i = t.peekLexeme();
+        if (void 0 == i) return void t.nextClause();
+        switch (i.type) {
+          case e.QueryLexer.TERM:
+            return t.nextClause(), e.QueryParser.parseTerm;
+          case e.QueryLexer.FIELD:
+            return t.nextClause(), e.QueryParser.parseField;
+          case e.QueryLexer.EDIT_DISTANCE:
+            return e.QueryParser.parseEditDistance;
+          case e.QueryLexer.BOOST:
+            return e.QueryParser.parseBoost;
+          case e.QueryLexer.PRESENCE:
+            return t.nextClause(), e.QueryParser.parsePresence;
+          default:
+            var n = "Unexpected lexeme type '" + i.type + "'";
+            throw new e.QueryParseError(n, i.start, i.end);
+        }
+      }
+    }),
+    (e.QueryParser.parseEditDistance = function (t) {
+      var r = t.consumeLexeme();
+      if (void 0 != r) {
+        var i = parseInt(r.str, 10);
+        if (isNaN(i)) {
+          var n = 'edit distance must be numeric';
+          throw new e.QueryParseError(n, r.start, r.end);
+        }
+        t.currentClause.editDistance = i;
+        var s = t.peekLexeme();
+        if (void 0 == s) return void t.nextClause();
+        switch (s.type) {
+          case e.QueryLexer.TERM:
+            return t.nextClause(), e.QueryParser.parseTerm;
+          case e.QueryLexer.FIELD:
+            return t.nextClause(), e.QueryParser.parseField;
+          case e.QueryLexer.EDIT_DISTANCE:
+            return e.QueryParser.parseEditDistance;
+          case e.QueryLexer.BOOST:
+            return e.QueryParser.parseBoost;
+          case e.QueryLexer.PRESENCE:
+            return t.nextClause(), e.QueryParser.parsePresence;
+          default:
+            var n = "Unexpected lexeme type '" + s.type + "'";
+            throw new e.QueryParseError(n, s.start, s.end);
+        }
+      }
+    }),
+    (e.QueryParser.parseBoost = function (t) {
+      var r = t.consumeLexeme();
+      if (void 0 != r) {
+        var i = parseInt(r.str, 10);
+        if (isNaN(i)) {
+          var n = 'boost must be numeric';
+          throw new e.QueryParseError(n, r.start, r.end);
+        }
+        t.currentClause.boost = i;
+        var s = t.peekLexeme();
+        if (void 0 == s) return void t.nextClause();
+        switch (s.type) {
+          case e.QueryLexer.TERM:
+            return t.nextClause(), e.QueryParser.parseTerm;
+          case e.QueryLexer.FIELD:
+            return t.nextClause(), e.QueryParser.parseField;
+          case e.QueryLexer.EDIT_DISTANCE:
+            return e.QueryParser.parseEditDistance;
+          case e.QueryLexer.BOOST:
+            return e.QueryParser.parseBoost;
+          case e.QueryLexer.PRESENCE:
+            return t.nextClause(), e.QueryParser.parsePresence;
+          default:
+            var n = "Unexpected lexeme type '" + s.type + "'";
+            throw new e.QueryParseError(n, s.start, s.end);
+        }
+      }
+    }),
+    (function (e, t) {
+      'function' == typeof define && define.amd
+        ? define(t)
+        : 'object' == typeof exports
+        ? (module.exports = t())
+        : (e.lunr = t());
+    })(this, function () {
+      return e;
+    });
+})();