code: def rename(self, node):
          
          child = self.translate(node.child)
          attributes = ''
          if node.attributes:
              attributes = '({})'.format(', '.join(node.attributes.names))
          return '[.${op}_{{{name}{attributes}}}$ {child} ]'\
              .format(op=latex_operator[node.operator], name=node.name,
                      attributes=attributes,
                      child=child)
docs: Translate a rename node into latex qtree node.
          :param node: a treebrd node
          :return: a qtree subtree rooted at the node