code: @Override
  	public boolean isAncestor(final TreeNode otherNode) {
  		if (otherNode != null) {
  			for (TreeNode node = getParent(); node != null; node = node.getParent()) {
  				if (node == otherNode) {
  					return true;
  				}
  			}
  		}
  
  		return false;
  	}
docs: {@inheritDoc}