code: def to_tornado_future(asyncio_future):
      """Convert an `asyncio.Future` to a `tornado.concurrent.Future`.
  
      .. versionadded:: 4.1
      """
      tf = tornado.concurrent.Future()
      tornado.concurrent.chain_future(asyncio_future, tf)
      return tf
  
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 1 for calling a global function with example usage: to_tornado_future(asyncio_future) and returns: tf