code: public static TreeNode nodeFor(Object object) {
      TreeNode node = getTreeNode(object);
      return node == null ? null : new ContextAwareTreeNode(node, object);
    }
docs: Return the {@code TreeNode} associated with this object.
  <p>
  Returns {@code null} if the supplied object has no associated context node.
  
  @param object object to lookup node for
  @return {@code TreeNode} associated with this object