code: def set_close_callback(self, callback):
      # WSGI has no facility for detecting a closed connection mid-request,
      # so we can simply ignore the callback.
      pass
  
imports: from __future__ import absolute_import, division, print_function
  import sys
  from io import BytesIO
  import tornado
  from tornado.concurrent import Future
  from tornado import escape
  from tornado import httputil
  from tornado.log import access_log
  from tornado import web
  from tornado.escape import native_str
  from tornado.util import unicode_type, PY3
label_desc: Use image node_id 2 for calling the _WSGIConnection obj's underlying member method code with example usage: obj.set_close_callback(callback) without return types