code: def _default_loop(self):
      return IOLoop.current()
  
imports: import zmq
  from zmq._future import _AsyncPoller, _AsyncSocket
  from tornado.concurrent import Future
  from tornado.ioloop import IOLoop
label_desc: Use image node_id 1 for calling the _AsyncTornado obj's underlying member method code with example usage: obj._default_loop() and returns: IOLoop