--- xerces-2_11_0.orig/src/org/apache/html/dom/HTMLElementImpl.java	2010-11-26 15:42:05.000000000 -0500
+++ xerces-2_11_0/src/org/apache/html/dom/HTMLElementImpl.java	2015-12-02 09:54:52.042144620 -0500
@@ -20,6 +20,7 @@
 
 import org.apache.xerces.dom.ElementImpl;
 import org.w3c.dom.Attr;
+import org.w3c.dom.Document;
 import org.w3c.dom.Node;
 import org.w3c.dom.NodeList;
 import org.w3c.dom.html.HTMLElement;
@@ -254,4 +255,7 @@
         return null;
     }
 
+    public Document getContentDocument() { 
+        throw new UnsupportedOperationException(); 
+    }
 }