code: def stop(self):
      self.asyncio_loop.stop()
  
imports: from __future__ import absolute_import, division, print_function
  import functools
  import tornado.concurrent
  from tornado.gen import convert_yielded
  from tornado.ioloop import IOLoop
  from tornado import stack_context
label_desc: Use image node_id 8 for calling the BaseAsyncIOLoop obj's underlying member method code with example usage: obj.stop() without return types