Added accessors for the underlying resolvers

src/main/java/com/xmlcalabash/util/XProcURIResolver.java

@@ -65,18 +65,34 @@ public void setUnderlyingURIResolver(URIResolver resolver) {
         uriResolver = resolver;
     }
 
+    public URIResolver getUnderlyingURIResolver() {
+        return uriResolver;
+    }
+
     public void setUnderlyingEntityResolver(EntityResolver resolver) {
         entityResolver = resolver;
     }
 
+    public EntityResolver getUnderlyingEntityResolver() {
+        return entityResolver;
+    }
+
     public void setUnderlyingUnparsedTextURIResolver(UnparsedTextURIResolver resolver) {
         unparsedTextResolver = resolver;
     }
 
+    public UnparsedTextURIResolver getUnderlyingUnparsedTextURIResolver() {
+        return unparsedTextResolver;
+    }
+
     public void setUnderlyingModuleURIResolver(ModuleURIResolver resolver) {
         moduleURIResolver = resolver;
     }
 
+    public ModuleURIResolver getUnderlyingModuleURIResolver() {
+        return moduleURIResolver;
+    }
+
     public void cache(XdmNode doc, URI baseURI) {
         XdmNode root = S9apiUtils.getDocumentElement(doc);