* @return the handler registered for the subtag element of the curent XMLNode
*/
public XMLNode getHandlerFor(XMLElement element) {
ExtensionElementNode subNode = new ExtensionElementNode();
DeploymentExtensionDescriptor o = (DeploymentExtensionDescriptor) getDescriptor();
o.addElement((ExtensionElementDescriptor) subNode.getDescriptor());
subNode.setXMLRootTag(new XMLElement(TagNames.EXTENSION_ELEMENT));
subNode.setParentNode(this);
return subNode;
}