code: def install() -> None:
      """Install ``AsyncioSelectorReactor`` as the default Twisted reactor.
  
      .. deprecated:: 5.1
  
         This function is provided for backwards compatibility; code
         that does not require compatibility with older versions of
         Tornado should use
         ``twisted.internet.asyncioreactor.install()`` directly.
  
      .. versionchanged:: 6.0.3
  
         In Tornado 5.x and before, this function installed a reactor
         based on the Tornado ``IOLoop``. When that reactor
         implementation was removed in Tornado 6.0.0, this function was
         removed as well. It was restored in Tornado 6.0.3 using the
         ``asyncio`` reactor instead.
  
      """
      from twisted.internet.asyncioreactor import install
  
      install()
  
file_path: catboost/contrib/python/tornado/tornado-6/tornado/platform/twisted.py
imports: import socket
  import sys
  import twisted.internet.abstract
  import twisted.internet.asyncioreactor
  from twisted.internet.defer import Deferred
  from twisted.python import failure
  import twisted.names.cache
  import twisted.names.client
  import twisted.names.hosts
  import twisted.names.resolve
  from tornado.concurrent import Future, future_set_exc_info
  from tornado.escape import utf8
  from tornado import gen
  from tornado.netutil import Resolver
  import typing
label_desc: Use image node_id 1 for calling a global function with example usage: install() without return types