diff --git a/DependencyInjection/CmfTreeBrowserExtension.php b/DependencyInjection/CmfTreeBrowserExtension.php
index 13eb9ca..b32abba 100644
--- a/DependencyInjection/CmfTreeBrowserExtension.php
+++ b/DependencyInjection/CmfTreeBrowserExtension.php
@@ -11,8 +11,10 @@
 
 namespace Symfony\Cmf\Bundle\TreeBrowserBundle\DependencyInjection;
 
+use Symfony\Component\Config\FileLocator;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\DependencyInjection\Extension\PrependExtensionInterface;
+use Symfony\Component\DependencyInjection\Loader\XmlFileLoader;
 use Symfony\Component\HttpKernel\DependencyInjection\Extension;
 
 class CmfTreeBrowserExtension extends Extension implements PrependExtensionInterface
@@ -40,5 +42,10 @@ public function prepend(ContainerBuilder $container)
      */
     public function load(array $configs, ContainerBuilder $container)
     {
+        $loader = new XmlFileLoader($container, new FileLocator(__DIR__.'/../Resources/config'));
+        $loader->load('services.xml');
+
+        $config = $this->processConfiguration(new Configuration(), $configs);
+        $container->setParameter('cmf_tree_browser.description.icon_map', $config['icons']);
     }
 }
diff --git a/DependencyInjection/Configuration.php b/DependencyInjection/Configuration.php
new file mode 100644
index 0000000..ea63a7d
--- /dev/null
+++ b/DependencyInjection/Configuration.php
@@ -0,0 +1,36 @@
+<?php
+
+/*
+ * This file is part of the Symfony CMF package.
+ *
+ * (c) 2011-2017 Symfony CMF
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Cmf\Bundle\TreeBrowserBundle\DependencyInjection;
+
+use Symfony\Component\Config\Definition\Builder\TreeBuilder;
+use Symfony\Component\Config\Definition\ConfigurationInterface;
+
+class Configuration implements ConfigurationInterface
+{
+    public function getConfigTreeBuilder()
+    {
+        $treeBuilder = new TreeBuilder();
+        $rootNode = $treeBuilder->root('cmf_tree_browser');
+
+        $rootNode
+            ->children()
+                ->arrayNode('icons')
+                    ->useAttributeAsKey('class')
+                    ->prototype('scalar')->end()
+                    ->info('A mapping of classes/interfaces and icon classes or icon URLs used by the tree browser.')
+                ->end()
+            ->end()
+        ;
+
+        return $treeBuilder;
+    }
+}
diff --git a/Description/IconEnhancer.php b/Description/IconEnhancer.php
new file mode 100644
index 0000000..49122a8
--- /dev/null
+++ b/Description/IconEnhancer.php
@@ -0,0 +1,67 @@
+<?php
+
+/*
+ * This file is part of the Symfony CMF package.
+ *
+ * (c) 2011-2017 Symfony CMF
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Cmf\Bundle\TreeBrowserBundle\Description;
+
+use Symfony\Cmf\Component\Resource\Repository\Resource\CmfResource;
+use Symfony\Cmf\Component\Resource\Description\Description;
+use Symfony\Cmf\Component\Resource\Description\DescriptionEnhancerInterface;
+use Symfony\Cmf\Component\Resource\Puli\Api\PuliResource;
+
+/**
+ * A description enhancer to add custom tree node icons.
+ *
+ * @author Wouter de Jong <wouter@wouterj.nl>
+ */
+class IconEnhancer implements DescriptionEnhancerInterface
+{
+    private $iconMap;
+    private $classMap = [];
+
+    public function __construct(array $iconMap)
+    {
+        $this->iconMap = $iconMap;
+    }
+
+    public function enhance(Description $description)
+    {
+        $class = get_class($description->getResource()->getPayload());
+        if (isset($this->classMap[$class])) {
+            $class = $this->classMap[$class];
+        }
+
+        $description->set('icon', $this->iconMap[$class]);
+    }
+
+    public function supports(PuliResource $resource)
+    {
+        if (!$resource instanceof CmfResource) {
+            return false;
+        }
+
+        $payload = $resource->getPayload();
+        $payloadClass = get_class($payload);
+
+        if (isset($this->iconMap[$payloadClass]) || isset($this->classMap[$payloadClass])) {
+            return true;
+        }
+
+        foreach (array_keys($this->iconMap) as $class) {
+            if (is_a($payload, $class) || is_subclass_of($payload, $class)) {
+                $this->classMap[$payloadClass] = $class;
+
+                return true;
+            }
+        }
+
+        return false;
+    }
+}
diff --git a/Resources/assets/js/adapter/fancytree.js b/Resources/assets/js/adapter/fancytree.js
index 6fe4214..f320b33 100644
--- a/Resources/assets/js/adapter/fancytree.js
+++ b/Resources/assets/js/adapter/fancytree.js
@@ -71,7 +71,6 @@ export class FancytreeAdapter {
 
         this.$tree = $elem;
         var actions = this.actions;
-        var requestNode = this.requestNode;
         var requestNodeToFancytreeNode = (requestNode) => {
             if (requestNode.length === 0) {
                 return;
@@ -92,6 +91,10 @@ export class FancytreeAdapter {
 
             this.pathKeyMap[fancytreeNode.refPath] = key;
 
+            if (requestNode.descriptors.hasOwnProperty('icon')) {
+                fancytreeNode.icon = requestNode.descriptors.icon;
+            }
+
             for (let actionName in actions) {
                 var action = actions[actionName];
                 var url = action.url;
diff --git a/Resources/config/services.xml b/Resources/config/services.xml
new file mode 100644
index 0000000..ad25f04
--- /dev/null
+++ b/Resources/config/services.xml
@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<container xmlns="http://symfony.com/schema/dic/services"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://symfony.com/schema/dic/services http://symfony.com/schema/dic/services/services-1.0.xsd">
+
+    <services>
+        <service id="cmf_tree_browser.description.icon_enhancer"
+            class="Symfony\Cmf\Bundle\TreeBrowserBundle\Description\IconEnhancer"
+            public="false">
+            <argument>%cmf_tree_browser.description.icon_map%</argument>
+
+            <tag name="cmf_resource.description.enhancer" alias="cmf_tree_icons"/>
+        </service>
+    </services>
+
+</container>
diff --git a/Resources/public/js/cmf_tree_browser.fancytree.js b/Resources/public/js/cmf_tree_browser.fancytree.js
index 9d780b5..e1287f5 100644
--- a/Resources/public/js/cmf_tree_browser.fancytree.js
+++ b/Resources/public/js/cmf_tree_browser.fancytree.js
@@ -1,3 +1,3 @@
 !function(e){function t(i){if(n[i])return n[i].exports;var r=n[i]={exports:{},id:i,loaded:!1};return e[i].call(r.exports,r,r.exports,t),r.loaded=!0,r.exports}var n={};return t.m=e,t.c=n,t.p="",t(0)}([function(e,t,n){"use strict";function i(e){return e&&e.__esModule?e:{default:e}}var r=n(27),o=i(r),s=n(29);o.default.fn.cmfTree=function(e){e=o.default.extend({adapter:null,request:{load:null},actions:{}},e);var t=(0,o.default)(this),n=function(e){if("string"==typeof e)return(0,o.default)(e);if(e instanceof o.default)return e;throw"Cannot handle selector "+e+". You may want to pass a jQuery object or a jQuery selector."};if(!e.request.load)throw"cmfTree needs an AJAX URL to lazy load the tree, pass it using the `request.load` option.";e.adapter||(e.adapter=new s.FancytreeAdapter(e));var i=e.adapter;if(!i.bindToElement)throw"cmfTree adapters must have a bindToElement() method to specify the output element of the tree.";for(var r in e.actions)if(e.actions.hasOwnProperty(r)){if(!i.addAction)throw"The configured cmfTree adapter does not support actions, implement the addAction() method or use another adapter.";var a=e.actions[r];if(!a.url)throw'actions should have a url defined, "'+r+'" does not.';i.addAction(r,a.url,a.icon)}if(i.bindToElement(t),e.path_output){if(!i.bindToInput)throw"The configured cmfTree adapter does not support binding to an input field, implement the bindToInput() method or use another adapter.";i.bindToInput(n(e.path_output))}return i}},function(e,t,n){var i=n(43)("wks"),r=n(15),o=n(2).Symbol;e.exports=function(e){return 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s.preventDefault();switch(k.eventToString(s)){case"+":case"=":l.nodeSetExpanded(t,!0);break;case"-":l.nodeSetExpanded(t,!1);break;case"space":a.isPagingNode()?l._triggerNodeEvent("clickPaging",t,s):c.checkbox?l.nodeToggleSelected(t):l.nodeSetActive(t,!0);break;case"return":l.nodeSetActive(t,!0);break;case"home":case"end":case"backspace":case"left":case"right":case"up":case"down":r=a.navigate(s.which,v,!0);break;default:p=!1}p&&s.preventDefault()},nodeLoadChildren:function(t,n){var i,o,s,a=t.tree,l=t.node,c=(new Date).getTime();return e.isFunction(n)&&(n=n.call(a,{type:"source"},t),r(!e.isFunction(n),"source callback must not return another function")),n.url&&(l._requestId&&l.warn("Recursive load request #"+c+" while #"+l._requestId+" is pending."),i=e.extend({},t.options.ajax,n),l._requestId=c,i.debugDelay?(o=i.debugDelay,e.isArray(o)&&(o=o[0]+Math.random()*(o[1]-o[0])),l.warn("nodeLoadChildren waiting debugDelay "+Math.round(o)+" ms 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r=a._makeHookContext(l,null,{error:e,args:Array.prototype.slice.call(arguments),message:i,details:e.status+": "+i});n.rejectWith(this,[r])})),e.isFunction(n.then)&&e.isFunction(n.catch)&&(s=n,n=new e.Deferred,s.then(function(e){n.resolve(e)},function(e){n.reject(e)})),e.isFunction(n.promise)&&(a.nodeSetStatus(t,"loading"),n.done(function(e){a.nodeSetStatus(t,"ok"),l._requestId=null}).fail(function(e){var n;return e===S?void l.warn("Ignored response for obsolete load request #"+c+" (expected #"+l._requestId+")"):(e.node&&e.error&&e.message?n=e:(n=a._makeHookContext(l,null,{error:e,args:Array.prototype.slice.call(arguments),message:e?e.message||e.toString():""}),"[object Object]"===n.message&&(n.message="")),l.warn("Load children failed ("+n.message+")",n),void(a._triggerNodeEvent("loadError",n,null)!==!1&&a.nodeSetStatus(t,"error",n.message,n.details)))})),e.when(n).done(function(t){var n;e.isPlainObject(t)&&(r(l.isRootNode(),"source may only be an object for root nodes (expecting an array of child objects otherwise)"),r(e.isArray(t.children),"if an object is passed as source, it must contain a 'children' array (all other properties are added to 'tree.data')"),n=t,t=t.children,delete n.children,e.extend(a.data,n)),r(e.isArray(t),"expected array of children"),l._setChildren(t),a._triggerNodeEvent("loadChildren",l)})},nodeLoadKeyPath:function(e,t){},nodeRemoveChild:function(t,n){var i,o=t.node,s=e.extend({},t,{node:n}),a=o.children;return 1===a.length?(r(n===a[0],"invalid single child"),this.nodeRemoveChildren(t)):(this.activeNode&&(n===this.activeNode||this.activeNode.isDescendantOf(n))&&this.activeNode.setActive(!1),this.focusNode&&(n===this.focusNode||this.focusNode.isDescendantOf(n))&&(this.focusNode=null),this.nodeRemoveMarkup(s),this.nodeRemoveChildren(s),i=e.inArray(n,a),r(i>=0,"invalid child"),o.triggerModifyChild("remove",n),n.visit(function(e){e.parent=null},!0),this._callHook("treeRegisterNode",this,!1,n),void a.splice(i,1))},nodeRemoveChildMarkup:function(t){var n=t.node;n.ul&&(n.isRootNode()?e(n.ul).empty():(e(n.ul).remove(),n.ul=null),n.visit(function(e){e.li=e.ul=null}))},nodeRemoveChildren:function(t){var n,i=t.tree,r=t.node,o=r.children;o&&(this.activeNode&&this.activeNode.isDescendantOf(r)&&this.activeNode.setActive(!1),this.focusNode&&this.focusNode.isDescendantOf(r)&&(this.focusNode=null),this.nodeRemoveChildMarkup(t),n=e.extend({},t),r.triggerModifyChild("remove",null),r.visit(function(e){e.parent=null,i._callHook("treeRegisterNode",i,!1,e)}),r.lazy?r.children=[]:r.children=null,r.isRootNode()||(r.expanded=!1),this.nodeRenderStatus(t))},nodeRemoveMarkup:function(t){var n=t.node;n.li&&(e(n.li).remove(),n.li=null),this.nodeRemoveChildMarkup(t)},nodeRender:function(t,i,o,s,a){var l,c,d,u,h,f,p,v=t.node,y=t.tree,g=t.options,b=g.aria,m=!1,x=v.parent,_=!x,k=v.children,N=null;if(y._enableUpdate!==!1&&(_||x.ul)){if(r(_||x.ul,"parent UL must 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class='fancytree-title'"+r+c+l+">"+(h.escapeTitles?p(d.title):d.title)+"</span>"),g.push(s),d.span.innerHTML=g.join(""),this.nodeRenderStatus(t),h.enhanceTitle&&(t.$title=e(">span.fancytree-title",d.span),s=h.enhanceTitle.call(u,{type:"enhanceTitle"},t)||""))},nodeRenderStatus:function(t){var n=t.node,i=t.tree,r=t.options,o=n.hasChildren(),s=n.isLastSibling(),a=r.aria,l=e(n.span).find(".fancytree-title"),c=r._classNames,d=[],u=n[i.statusClassPropName];u&&i._enableUpdate!==!1&&(d.push(c.node),i.activeNode===n&&d.push(c.active),i.focusNode===n&&d.push(c.focused),n.expanded?(d.push(c.expanded),a&&l.attr("aria-expanded",!0)):a&&(o?l.attr("aria-expanded",!1):l.removeAttr("aria-expanded")),n.folder&&d.push(c.folder),o!==!1&&d.push(c.hasChildren),s&&d.push(c.lastsib),n.lazy&&null==n.children&&d.push(c.lazy),n.partload&&d.push(c.partload),n.partsel&&d.push(c.partsel),n.unselectable&&d.push(c.unselectable),n._isLoading&&d.push(c.loading),n._error&&d.push(c.error),n.statusNodeType&&d.push(c.statusNodePrefix+n.statusNodeType),n.selected?(d.push(c.selected),a&&l.attr("aria-selected",!0)):a&&l.attr("aria-selected",!1),n.extraClasses&&d.push(n.extraClasses),o===!1?d.push(c.combinedExpanderPrefix+"n"+(s?"l":"")):d.push(c.combinedExpanderPrefix+(n.expanded?"e":"c")+(n.lazy&&null==n.children?"d":"")+(s?"l":"")),d.push(c.combinedIconPrefix+(n.expanded?"e":"c")+(n.folder?"f":"")),u.className=d.join(" "),n.li&&(n.li.className=s?c.lastsib:""))},nodeSetActive:function(t,n,i){i=i||{};var o,s=t.node,a=t.tree,l=t.options,c=i.noEvents===!0,h=i.noFocus===!0,f=s===a.activeNode;return n=n!==!1,f===n?d(s):n&&!c&&this._triggerNodeEvent("beforeActivate",s,t.originalEvent)===!1?u(s,["rejected"]):(n?(a.activeNode&&(r(a.activeNode!==s,"node was active (inconsistency)"),o=e.extend({},t,{node:a.activeNode}),a.nodeSetActive(o,!1),r(null===a.activeNode,"deactivate was out of sync?")),l.activeVisible&&s.makeVisible({scrollIntoView:h&&null==a.focusNode}),a.activeNode=s,a.nodeRenderStatus(t),h||a.nodeSetFocus(t),c||a._triggerNodeEvent("activate",s,t.originalEvent)):(r(a.activeNode===s,"node was not active (inconsistency)"),a.activeNode=null,this.nodeRenderStatus(t),c||t.tree._triggerNodeEvent("deactivate",s,t.originalEvent)),d(s))},nodeSetExpanded:function(t,n,r){r=r||{};var o,s,a,l,c,h,f=t.node,p=t.tree,v=t.options,y=r.noAnimation===!0,g=r.noEvents===!0;if(n=n!==!1,f.expanded&&n||!f.expanded&&!n)return d(f);if(n&&!f.lazy&&!f.hasChildren())return d(f);if(!n&&f.getLevel()<v.minExpandLevel)return u(f,["locked"]);if(!g&&this._triggerNodeEvent("beforeExpand",f,t.originalEvent)===!1)return u(f,["rejected"]);if(y||f.isVisible()||(y=r.noAnimation=!0),s=new e.Deferred,n&&!f.expanded&&v.autoCollapse){c=f.getParentList(!1,!0),h=v.autoCollapse;try{for(v.autoCollapse=!1,a=0,l=c.length;a<l;a++)this._callHook("nodeCollapseSiblings",c[a],r)}finally{v.autoCollapse=h}}return s.done(function(){var e=f.getLastChild();n&&v.autoScroll&&!y&&e?e.scrollIntoView(!0,{topNode:f}).always(function(){g||t.tree._triggerNodeEvent(n?"expand":"collapse",t)}):g||t.tree._triggerNodeEvent(n?"expand":"collapse",t)}),o=function(i){var r,o,s=v.toggleEffect;if(f.expanded=n,p._callHook("nodeRender",t,!1,!1,!0),f.ul)if(r="none"!==f.ul.style.display,o=!!f.expanded,r===o)f.warn("nodeSetExpanded: UL.style.display already set");else{if(s&&!y)return void e(f.ul).toggle(s.effect,s.options,s.duration,function(){i()});f.ul.style.display=f.expanded||!parent?"":"none"}i()},n&&f.lazy&&f.hasChildren()===i?f.load().done(function(){s.notifyWith&&s.notifyWith(f,["loaded"]),o(function(){s.resolveWith(f)})}).fail(function(e){o(function(){s.rejectWith(f,["load failed ("+e+")"])})}):o(function(){s.resolveWith(f)}),s.promise()},nodeSetFocus:function(t,i){var r,o=t.tree,s=t.node,a=o.options,l=!!t.originalEvent&&e(t.originalEvent.target).is(":input");if(i=i!==!1,o.focusNode){if(o.focusNode===s&&i)return;r=e.extend({},t,{node:o.focusNode}),o.focusNode=null,this._triggerNodeEvent("blur",r),this._callHook("nodeRenderStatus",r)}i&&(this.hasFocus()||(s.debug("nodeSetFocus: forcing container focus"),this._callHook("treeSetFocus",t,!0,{calledByNode:!0})),s.makeVisible({scrollIntoView:!1}),o.focusNode=s,a.titlesTabbable?l||e(s.span).find(".fancytree-title").focus():0===e(n.activeElement).closest(".fancytree-container").length&&e(o.$container).focus(),a.aria&&e(o.$container).attr("aria-activedescendant","ftal_"+a.idPrefix+s.key),this._triggerNodeEvent("focus",t),a.autoScroll&&s.scrollIntoView(),this._callHook("nodeRenderStatus",t))},nodeSetSelected:function(e,t){var n=e.node,i=e.tree,r=e.options;if(t=t!==!1,!n.unselectable){if(n.selected&&t||!n.selected&&!t)return!!n.selected;if(this._triggerNodeEvent("beforeSelect",n,e.originalEvent)===!1)return!!n.selected;t&&1===r.selectMode?i.lastSelectedNode&&i.lastSelectedNode.setSelected(!1):3===r.selectMode&&(n.selected=t,n.fixSelection3AfterClick()),n.selected=t,this.nodeRenderStatus(e),i.lastSelectedNode=t?n:null,i._triggerNodeEvent("select",e)}},nodeSetStatus:function(t,n,i,r){function o(){var e=a.children?a.children[0]:null;if(e&&e.isStatusNode()){try{a.ul&&(a.ul.removeChild(e.li),e.li=null)}catch(e){}1===a.children.length?a.children=[]:a.children.shift()}}function s(t,n){var i=a.children?a.children[0]:null;return i&&i.isStatusNode()?(e.extend(i,t),i.statusNodeType=n,l._callHook("nodeRenderTitle",i)):(a._setChildren([t]),a.children[0].statusNodeType=n,l.render()),a.children[0]}var a=t.node,l=t.tree;switch(n){case"ok":o(),a._isLoading=!1,a._error=null,a.renderStatus();break;case"loading":a.parent||s({title:l.options.strings.loading+(i?" ("+i+")":""),checkbox:!1,tooltip:r},n),a._isLoading=!0,a._error=null,a.renderStatus();break;case"error":s({title:l.options.strings.loadError+(i?" ("+i+")":""),checkbox:!1,tooltip:r},n),a._isLoading=!1,a._error={message:i,details:r},a.renderStatus();break;case"nodata":s({title:l.options.strings.noData,checkbox:!1,tooltip:r},n),a._isLoading=!1,a._error=null,a.renderStatus();break;default:e.error("invalid node status "+n)}},nodeToggleExpanded:function(e){return this.nodeSetExpanded(e,!e.node.expanded)},nodeToggleSelected:function(e){return this.nodeSetSelected(e,!e.node.selected)},treeClear:function(e){var t=e.tree;t.activeNode=null,t.focusNode=null,t.$div.find(">ul.fancytree-container").empty(),t.rootNode.children=null},treeCreate:function(e){},treeDestroy:function(e){this.$div.find(">ul.fancytree-container").remove(),this.$source&&this.$source.removeClass("ui-helper-hidden")},treeInit:function(e){this.treeLoad(e)},treeLoad:function(t,n){var i,o,s,a,l=t.tree,c=t.widget.element,d=e.extend({},t,{node:this.rootNode});if(l.rootNode.children&&this.treeClear(t),n=n||this.options.source)"string"==typeof n&&e.error("Not implemented");else switch(o=c.data("type")||"html"){case"html":s=c.find(">ul:first"),s.addClass("ui-fancytree-source ui-helper-hidden"),n=e.ui.fancytree.parseHtml(s),this.data=e.extend(this.data,f(s));break;case"json":n=e.parseJSON(c.text()),c.contents().filter(function(){return 3===this.nodeType}).remove(),e.isPlainObject(n)&&(r(e.isArray(n.children),"if an object is passed as source, it must contain a 'children' array (all other properties are added to 'tree.data')"),i=n,n=n.children,delete i.children,e.extend(l.data,i));break;default:e.error("Invalid data-type: "+o)}return 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r=t.tree,o=!0,s=!1;switch(n){case"aria":case"checkbox":case"icon":case"minExpandLevel":case"tabindex":r._callHook("treeCreate",r),s=!0;break;case"escapeTitles":case"tooltip":s=!0;break;case"rtl":i===!1?r.$container.attr("DIR",null).removeClass("fancytree-rtl"):r.$container.attr("DIR","RTL").addClass("fancytree-rtl"),s=!0;break;case"source":o=!1,r._callHook("treeLoad",r,i),s=!0}r.debug("set option "+n+"="+i+" <"+typeof 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this.tree._callHook("treeSetOption",this.tree,e,t)},destroy:function(){this._unbind(),this.tree._callHook("treeDestroy",this.tree),e.Widget.prototype.destroy.call(this)},_unbind:function(){var t=this.tree._ns;this.element.unbind(t),this.tree.$container.unbind(t),e(n).unbind(t)},_bind:function(){var e=this,t=this.options,n=this.tree,i=n._ns;this._unbind(),n.$container.on("focusin"+i+" focusout"+i,function(e){var t=k.getNode(e),i="focusin"===e.type;t?n._callHook("nodeSetFocus",n._makeHookContext(t,e),i):n._callHook("treeSetFocus",n,i)}).on("selectstart"+i,"span.fancytree-title",function(e){e.preventDefault()}).on("keydown"+i,function(e){if(t.disabled||t.keyboard===!1)return!0;var i,r=n.focusNode,o=n._makeHookContext(r||n,e),s=n.phase;try{return n.phase="userEvent",i=r?n._triggerNodeEvent("keydown",r,e):n._triggerTreeEvent("keydown",e),"preventNav"===i?i=!0:i!==!1&&(i=n._callHook("nodeKeydown",o)),i}finally{n.phase=s}}).on("click"+i+" dblclick"+i,function(n){if(t.disabled)return!0;var 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n=t&&t.target?t.target.className:"",r={node:this.getNode(t.target),type:i};return/\bfancytree-title\b/.test(n)?r.type="title":/\bfancytree-expander\b/.test(n)?r.type=r.node.hasChildren()===!1?"prefix":"expander":/\bfancytree-checkbox\b/.test(n)||/\bfancytree-radio\b/.test(n)?r.type="checkbox":/\bfancytree-icon\b/.test(n)?r.type="icon":/\bfancytree-node\b/.test(n)?r.type="title":t&&t.target&&e(t.target).closest(".fancytree-title").length&&(r.type="title"),r},getNode:function(e){if(e instanceof b)return e;for(e.selector!==i?e=e[0]:e.originalEvent!==i&&(e=e.target);e;){if(e.ftnode)return e.ftnode;e=e.parentNode}return null},getTree:function(t){var n;return t instanceof m?t:(t===i&&(t=0),"number"==typeof t?t=e(".fancytree-container").eq(t):"string"==typeof t?t=e(t).eq(0):t.selector!==i?t=t.eq(0):t.originalEvent!==i&&(t=e(t.target)),t=t.closest(":ui-fancytree"),n=t.data("ui-fancytree")||t.data("fancytree"),n?n.tree:null)},eventToString:function(e){var t=e.which,n=e.type,i=[];return 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n=t.node,i=t.tree,r=t.options,o=n.hasChildren(),s=n.isLastSibling(),a=r.aria,l=e(n.span).find(".fancytree-title"),c=r._classNames,d=[],u=n[i.statusClassPropName];u&&i._enableUpdate!==!1&&(d.push(c.node),i.activeNode===n&&d.push(c.active),i.focusNode===n&&d.push(c.focused),n.expanded?(d.push(c.expanded),a&&l.attr("aria-expanded",!0)):a&&(o?l.attr("aria-expanded",!1):l.removeAttr("aria-expanded")),n.folder&&d.push(c.folder),o!==!1&&d.push(c.hasChildren),s&&d.push(c.lastsib),n.lazy&&null==n.children&&d.push(c.lazy),n.partload&&d.push(c.partload),n.partsel&&d.push(c.partsel),n.unselectable&&d.push(c.unselectable),n._isLoading&&d.push(c.loading),n._error&&d.push(c.error),n.statusNodeType&&d.push(c.statusNodePrefix+n.statusNodeType),n.selected?(d.push(c.selected),a&&l.attr("aria-selected",!0)):a&&l.attr("aria-selected",!1),n.extraClasses&&d.push(n.extraClasses),o===!1?d.push(c.combinedExpanderPrefix+"n"+(s?"l":"")):d.push(c.combinedExpanderPrefix+(n.expanded?"e":"c")+(n.lazy&&null==n.children?"d":"")+(s?"l":"")),d.push(c.combinedIconPrefix+(n.expanded?"e":"c")+(n.folder?"f":"")),u.className=d.join(" "),n.li&&(n.li.className=s?c.lastsib:""))},nodeSetActive:function(t,n,i){i=i||{};var o,s=t.node,a=t.tree,l=t.options,c=i.noEvents===!0,h=i.noFocus===!0,f=s===a.activeNode;return n=n!==!1,f===n?d(s):n&&!c&&this._triggerNodeEvent("beforeActivate",s,t.originalEvent)===!1?u(s,["rejected"]):(n?(a.activeNode&&(r(a.activeNode!==s,"node was active (inconsistency)"),o=e.extend({},t,{node:a.activeNode}),a.nodeSetActive(o,!1),r(null===a.activeNode,"deactivate was out of sync?")),l.activeVisible&&s.makeVisible({scrollIntoView:h&&null==a.focusNode}),a.activeNode=s,a.nodeRenderStatus(t),h||a.nodeSetFocus(t),c||a._triggerNodeEvent("activate",s,t.originalEvent)):(r(a.activeNode===s,"node was not active (inconsistency)"),a.activeNode=null,this.nodeRenderStatus(t),c||t.tree._triggerNodeEvent("deactivate",s,t.originalEvent)),d(s))},nodeSetExpanded:function(t,n,r){r=r||{};var o,s,a,l,c,h,f=t.node,p=t.tree,v=t.options,y=r.noAnimation===!0,g=r.noEvents===!0;if(n=n!==!1,f.expanded&&n||!f.expanded&&!n)return d(f);if(n&&!f.lazy&&!f.hasChildren())return d(f);if(!n&&f.getLevel()<v.minExpandLevel)return u(f,["locked"]);if(!g&&this._triggerNodeEvent("beforeExpand",f,t.originalEvent)===!1)return u(f,["rejected"]);if(y||f.isVisible()||(y=r.noAnimation=!0),s=new e.Deferred,n&&!f.expanded&&v.autoCollapse){c=f.getParentList(!1,!0),h=v.autoCollapse;try{for(v.autoCollapse=!1,a=0,l=c.length;a<l;a++)this._callHook("nodeCollapseSiblings",c[a],r)}finally{v.autoCollapse=h}}return s.done(function(){var e=f.getLastChild();n&&v.autoScroll&&!y&&e?e.scrollIntoView(!0,{topNode:f}).always(function(){g||t.tree._triggerNodeEvent(n?"expand":"collapse",t)}):g||t.tree._triggerNodeEvent(n?"expand":"collapse",t)}),o=function(i){var r,o,s=v.toggleEffect;if(f.expanded=n,p._callHook("nodeRender",t,!1,!1,!0),f.ul)if(r="none"!==f.ul.style.display,o=!!f.expanded,r===o)f.warn("nodeSetExpanded: UL.style.display already set");else{if(s&&!y)return void e(f.ul).toggle(s.effect,s.options,s.duration,function(){i()});f.ul.style.display=f.expanded||!parent?"":"none"}i()},n&&f.lazy&&f.hasChildren()===i?f.load().done(function(){s.notifyWith&&s.notifyWith(f,["loaded"]),o(function(){s.resolveWith(f)})}).fail(function(e){o(function(){s.rejectWith(f,["load failed ("+e+")"])})}):o(function(){s.resolveWith(f)}),s.promise()},nodeSetFocus:function(t,i){var r,o=t.tree,s=t.node,a=o.options,l=!!t.originalEvent&&e(t.originalEvent.target).is(":input");if(i=i!==!1,o.focusNode){if(o.focusNode===s&&i)return;r=e.extend({},t,{node:o.focusNode}),o.focusNode=null,this._triggerNodeEvent("blur",r),this._callHook("nodeRenderStatus",r)}i&&(this.hasFocus()||(s.debug("nodeSetFocus: forcing container focus"),this._callHook("treeSetFocus",t,!0,{calledByNode:!0})),s.makeVisible({scrollIntoView:!1}),o.focusNode=s,a.titlesTabbable?l||e(s.span).find(".fancytree-title").focus():0===e(n.activeElement).closest(".fancytree-container").length&&e(o.$container).focus(),a.aria&&e(o.$container).attr("aria-activedescendant","ftal_"+a.idPrefix+s.key),this._triggerNodeEvent("focus",t),a.autoScroll&&s.scrollIntoView(),this._callHook("nodeRenderStatus",t))},nodeSetSelected:function(e,t){var n=e.node,i=e.tree,r=e.options;if(t=t!==!1,!n.unselectable){if(n.selected&&t||!n.selected&&!t)return!!n.selected;if(this._triggerNodeEvent("beforeSelect",n,e.originalEvent)===!1)return!!n.selected;t&&1===r.selectMode?i.lastSelectedNode&&i.lastSelectedNode.setSelected(!1):3===r.selectMode&&(n.selected=t,n.fixSelection3AfterClick()),n.selected=t,this.nodeRenderStatus(e),i.lastSelectedNode=t?n:null,i._triggerNodeEvent("select",e)}},nodeSetStatus:function(t,n,i,r){function o(){var e=a.children?a.children[0]:null;if(e&&e.isStatusNode()){try{a.ul&&(a.ul.removeChild(e.li),e.li=null)}catch(e){}1===a.children.length?a.children=[]:a.children.shift()}}function s(t,n){var i=a.children?a.children[0]:null;return i&&i.isStatusNode()?(e.extend(i,t),i.statusNodeType=n,l._callHook("nodeRenderTitle",i)):(a._setChildren([t]),a.children[0].statusNodeType=n,l.render()),a.children[0]}var a=t.node,l=t.tree;switch(n){case"ok":o(),a._isLoading=!1,a._error=null,a.renderStatus();break;case"loading":a.parent||s({title:l.options.strings.loading+(i?" ("+i+")":""),checkbox:!1,tooltip:r},n),a._isLoading=!0,a._error=null,a.renderStatus();break;case"error":s({title:l.options.strings.loadError+(i?" ("+i+")":""),checkbox:!1,tooltip:r},n),a._isLoading=!1,a._error={message:i,details:r},a.renderStatus();break;case"nodata":s({title:l.options.strings.noData,checkbox:!1,tooltip:r},n),a._isLoading=!1,a._error=null,a.renderStatus();break;default:e.error("invalid node status "+n)}},nodeToggleExpanded:function(e){return this.nodeSetExpanded(e,!e.node.expanded)},nodeToggleSelected:function(e){return this.nodeSetSelected(e,!e.node.selected)},treeClear:function(e){var t=e.tree;t.activeNode=null,t.focusNode=null,t.$div.find(">ul.fancytree-container").empty(),t.rootNode.children=null},treeCreate:function(e){},treeDestroy:function(e){this.$div.find(">ul.fancytree-container").remove(),this.$source&&this.$source.removeClass("ui-helper-hidden")},treeInit:function(e){this.treeLoad(e)},treeLoad:function(t,n){var i,o,s,a,l=t.tree,c=t.widget.element,d=e.extend({},t,{node:this.rootNode});if(l.rootNode.children&&this.treeClear(t),n=n||this.options.source)"string"==typeof n&&e.error("Not implemented");else switch(o=c.data("type")||"html"){case"html":s=c.find(">ul:first"),s.addClass("ui-fancytree-source ui-helper-hidden"),n=e.ui.fancytree.parseHtml(s),this.data=e.extend(this.data,f(s));break;case"json":n=e.parseJSON(c.text()),c.contents().filter(function(){return 3===this.nodeType}).remove(),e.isPlainObject(n)&&(r(e.isArray(n.children),"if an object is passed as source, it must contain a 'children' array (all other properties are added to 'tree.data')"),i=n,n=n.children,delete i.children,e.extend(l.data,i));break;default:e.error("Invalid data-type: "+o)}return a=this.nodeLoadChildren(d,n).done(function(){l.render(),3===t.options.selectMode&&l.rootNode.fixSelection3FromEndNodes(),l.activeNode&&l.options.activeVisible&&l.activeNode.makeVisible(),l._triggerTreeEvent("init",null,{status:!0})}).fail(function(){l.render(),l._triggerTreeEvent("init",null,{status:!1})})},treeRegisterNode:function(e,t,n){},treeSetFocus:function(t,n,i){n=n!==!1,n!==this.hasFocus()&&(this._hasFocus=n,!n&&this.focusNode?this.focusNode.setFocus(!1):!n||i&&i.calledByNode||e(this.$container).focus(),this.$container.toggleClass("fancytree-treefocus",n),this._triggerTreeEvent(n?"focusTree":"blurTree"),n&&!this.activeNode&&this.getFirstChild()&&this.getFirstChild().setFocus())},treeSetOption:function(t,n,i){var r=t.tree,o=!0,s=!1;switch(n){case"aria":case"checkbox":case"icon":case"minExpandLevel":case"tabindex":r._callHook("treeCreate",r),s=!0;break;case"escapeTitles":case"tooltip":s=!0;break;case"rtl":i===!1?r.$container.attr("DIR",null).removeClass("fancytree-rtl"):r.$container.attr("DIR","RTL").addClass("fancytree-rtl"),s=!0;break;case"source":o=!1,r._callHook("treeLoad",r,i),s=!0}r.debug("set option "+n+"="+i+" <"+typeof i+">"),o&&(this.widget._super?this.widget._super.call(this.widget,n,i):e.Widget.prototype._setOption.call(this.widget,n,i)),s&&r.render(!0,!1)}}),e.widget("ui.fancytree",{options:{activeVisible:!0,ajax:{type:"GET",cache:!1,dataType:"json"},aria:!1,autoActivate:!0,autoCollapse:!1,autoScroll:!1,checkbox:!1,clickFolderMode:4,debugLevel:null,disabled:!1,enableAspx:!0,escapeTitles:!1,extensions:[],toggleEffect:{effect:"blind",options:{direction:"vertical",scale:"box"},duration:200},generateIds:!1,icon:!0,idPrefix:"ft_",focusOnSelect:!1,keyboard:!0,keyPathSeparator:"/",minExpandLevel:1,quicksearch:!1,rtl:!1,scrollOfs:{top:0,bottom:0},scrollParent:null,selectMode:2,strings:{loading:"Loading&#8230;",loadError:"Load error!",moreData:"More&#8230;",noData:"No data."},tabindex:"0",titlesTabbable:!1,tooltip:!1,_classNames:{node:"fancytree-node",folder:"fancytree-folder",combinedExpanderPrefix:"fancytree-exp-",combinedIconPrefix:"fancytree-ico-",hasChildren:"fancytree-has-children",active:"fancytree-active",selected:"fancytree-selected",expanded:"fancytree-expanded",lazy:"fancytree-lazy",focused:"fancytree-focused",partload:"fancytree-partload",partsel:"fancytree-partsel",unselectable:"fancytree-unselectable",lastsib:"fancytree-lastsib",loading:"fancytree-loading",error:"fancytree-error",statusNodePrefix:"fancytree-statusnode-"},lazyLoad:null,postProcess:null},_create:function(){this.tree=new m(this),this.$source=this.source||"json"===this.element.data("type")?this.element:this.element.find(">ul:first");var t,n,o,s=this.options,a=s.extensions,l=this.tree;for(o=0;o<a.length;o++)n=a[o],t=e.ui.fancytree._extensions[n],t||e.error("Could not apply extension '"+n+"' (it is not registered, did you forget to include 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this.tree._callHook("treeSetOption",this.tree,e,t)},destroy:function(){this._unbind(),this.tree._callHook("treeDestroy",this.tree),e.Widget.prototype.destroy.call(this)},_unbind:function(){var t=this.tree._ns;this.element.unbind(t),this.tree.$container.unbind(t),e(n).unbind(t)},_bind:function(){var e=this,t=this.options,n=this.tree,i=n._ns;this._unbind(),n.$container.on("focusin"+i+" focusout"+i,function(e){var t=k.getNode(e),i="focusin"===e.type;t?n._callHook("nodeSetFocus",n._makeHookContext(t,e),i):n._callHook("treeSetFocus",n,i)}).on("selectstart"+i,"span.fancytree-title",function(e){e.preventDefault()}).on("keydown"+i,function(e){if(t.disabled||t.keyboard===!1)return!0;var i,r=n.focusNode,o=n._makeHookContext(r||n,e),s=n.phase;try{return n.phase="userEvent",i=r?n._triggerNodeEvent("keydown",r,e):n._triggerTreeEvent("keydown",e),"preventNav"===i?i=!0:i!==!1&&(i=n._callHook("nodeKeydown",o)),i}finally{n.phase=s}}).on("click"+i+" dblclick"+i,function(n){if(t.disabled)return!0;var i,r=k.getEventTarget(n),o=r.node,s=e.tree,a=s.phase;if(!o)return!0;i=s._makeHookContext(o,n);try{switch(s.phase="userEvent",n.type){case"click":return i.targetType=r.type,o.isPagingNode()?s._triggerNodeEvent("clickPaging",i,n)===!0:s._triggerNodeEvent("click",i,n)!==!1&&s._callHook("nodeClick",i);case"dblclick":return i.targetType=r.type,s._triggerNodeEvent("dblclick",i,n)!==!1&&s._callHook("nodeDblclick",i)}}finally{s.phase=a}})},getActiveNode:function(){return this.tree.activeNode},getNodeByKey:function(e){return this.tree.getNodeByKey(e)},getRootNode:function(){return this.tree.rootNode},getTree:function(){return this.tree}}),k=e.ui.fancytree,e.extend(e.ui.fancytree,{version:"2.21.0",buildType:"production",debugLevel:1,_nextId:1,_nextNodeKey:1,_extensions:{},_FancytreeClass:m,_FancytreeNodeClass:b,jquerySupports:{positionMyOfs:a(e.ui.version,1,9)},assert:function(e,t){return r(e,t)},debounce:function(e,t,n,i){var r;return 3===arguments.length&&"boolean"!=typeof n&&(i=n,n=!1),function(){var o=arguments;i=i||this,n&&!r&&t.apply(i,o),clearTimeout(r),r=setTimeout(function(){n||t.apply(i,o),r=null},e)}},debug:function(t){e.ui.fancytree.debugLevel>=2&&o("log",arguments)},error:function(e){o("error",arguments)},escapeHtml:p,fixPositionOptions:function(t){if((t.offset||(""+t.my+t.at).indexOf("%")>=0)&&e.error("expected new position syntax (but '%' is not supported)"),!e.ui.fancytree.jquerySupports.positionMyOfs){var n=/(\w+)([+-]?\d+)?\s+(\w+)([+-]?\d+)?/.exec(t.my),i=/(\w+)([+-]?\d+)?\s+(\w+)([+-]?\d+)?/.exec(t.at),r=(n[2]?+n[2]:0)+(i[2]?+i[2]:0),o=(n[4]?+n[4]:0)+(i[4]?+i[4]:0);t=e.extend({},t,{my:n[1]+" "+n[3],at:i[1]+" "+i[3]}),(r||o)&&(t.offset=""+r+" "+o)}return t},getEventTargetType:function(e){return this.getEventTarget(e).type},getEventTarget:function(t){var n=t&&t.target?t.target.className:"",r={node:this.getNode(t.target),type:i};return/\bfancytree-title\b/.test(n)?r.type="title":/\bfancytree-expander\b/.test(n)?r.type=r.node.hasChildren()===!1?"prefix":"expander":/\bfancytree-checkbox\b/.test(n)||/\bfancytree-radio\b/.test(n)?r.type="checkbox":/\bfancytree-icon\b/.test(n)?r.type="icon":/\bfancytree-node\b/.test(n)?r.type="title":t&&t.target&&e(t.target).closest(".fancytree-title").length&&(r.type="title"),r},getNode:function(e){if(e instanceof b)return e;for(e.selector!==i?e=e[0]:e.originalEvent!==i&&(e=e.target);e;){if(e.ftnode)return e.ftnode;e=e.parentNode}return null},getTree:function(t){var n;return t instanceof m?t:(t===i&&(t=0),"number"==typeof t?t=e(".fancytree-container").eq(t):"string"==typeof t?t=e(t).eq(0):t.selector!==i?t=t.eq(0):t.originalEvent!==i&&(t=e(t.target)),t=t.closest(":ui-fancytree"),n=t.data("ui-fancytree")||t.data("fancytree"),n?n.tree:null)},eventToString:function(e){var t=e.which,n=e.type,i=[];return e.altKey&&i.push("alt"),e.ctrlKey&&i.push("ctrl"),e.metaKey&&i.push("meta"),e.shiftKey&&i.push("shift"),"click"===n||"dblclick"===n?i.push(A[e.button]+n):E[t]||i.push(P[t]||String.fromCharCode(t).toLowerCase()),i.join("+")},info:function(t){e.ui.fancytree.debugLevel>=1&&o("info",arguments)},keyEventToString:function(e){return this.warn("keyEventToString() is deprecated: use eventToString()"),this.eventToString(e)},overrideMethod:function(t,n,i){var r,o=t[n]||e.noop;t[n]=function(){try{return r=this._super,this._super=o,i.apply(this,arguments)}finally{this._super=r}}},parseHtml:function(t){var n,r,o,s,a,l,c,d,u=t.find(">li"),h=[];return u.each(function(){var u,p,v=e(this),y=v.find(">span:first",this),g=y.length?null:v.find(">a:first"),b={tooltip:null,data:{}};for(y.length?b.title=y.html():g&&g.length?(b.title=g.html(),b.data.href=g.attr("href"),b.data.target=g.attr("target"),b.tooltip=g.attr("title")):(b.title=v.html(),a=b.title.search(/<ul/i),a>=0&&(b.title=b.title.substring(0,a))),b.title=e.trim(b.title),s=0,l=F.length;s<l;s++)b[F[s]]=i;for(n=this.className.split(" "),o=[],s=0,l=n.length;s<l;s++)r=n[s],L[r]?b[r]=!0:o.push(r);if(b.extraClasses=o.join(" "),c=v.attr("title"),c&&(b.tooltip=c),c=v.attr("id"),c&&(b.key=c),u=f(v),u&&!e.isEmptyObject(u)){for(p in H)u.hasOwnProperty(p)&&(u[H[p]]=u[p],delete u[p]);for(s=0,l=j.length;s<l;s++)c=j[s],d=u[c],null!=d&&(delete u[c],b[c]=d);e.extend(b.data,u)}t=v.find(">ul:first"),t.length?b.children=e.ui.fancytree.parseHtml(t):b.children=b.lazy?i:null,h.push(b)}),h},registerExtension:function(t){r(null!=t.name,"extensions must have a `name` property."),r(null!=t.version,"extensions must have a `version` 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diff --git a/composer.json b/composer.json
index 700f8f8..cd6bc1a 100644
--- a/composer.json
+++ b/composer.json
@@ -13,7 +13,7 @@
     ],
     "require": {
         "php": "^5.6|^7.0",
-        "symfony-cmf/resource-rest-bundle": "~1.0"
+        "symfony-cmf/resource-rest-bundle": "1.0.*"
     },
     "require-dev": {
         "symfony/form": "^2.8|^3.0"