code: def cancel(self):
      self.loop.remove_timeout(self.timeout)
  
imports: import asyncio
  import warnings
  from typing import Any, Type
  from tornado.concurrent import Future
  from tornado.ioloop import IOLoop
  import zmq
  from zmq._future import _AsyncPoller, _AsyncSocket
label_desc: Use image node_id 2 for calling the _CancellableTornadoTimeout obj's underlying member method code with example usage: obj.cancel() without return types