code: protected DefaultMutableTreeNode getDataAsTree() {
          try {
              return (DefaultMutableTreeNode) MethodUtils.invokeMethod(view, "getDataAsTree", null);
          } catch (Exception e) {
              return null;
          }
      }
docs: Invokes the "getDataAsTree" method on the underlying view, if such a method exists.
  
  @return The view's topic tree, or null if none.