if (!WadlTreeRoot.containsButton(buttonTreeItems, ApplicationItem.button + WadlXml.methodNode)) {
// add method button
HorizontalPanel addMethodPanel = new HorizontalPanel();
Button addMethodButton = new Button(GuiFactory.strings.addMethod());
addMethodButton.addClickListener(new ClickListener() {
public void onClick(Widget sender) {
if (parentNode instanceof ResourceNode) {
((ResourceNode) parentNode).directlyAddMethod(new MethodNode(GuiFactory.strings.newMethod(), (GenericNode) parentNode, ((GenericNode) parentNode).getApplication()));
listMethods(parentNode, parentTreeItem, requestString);
}