code: def on_connection_close(self):
      self.delegate.on_connection_close()
  
imports: from __future__ import absolute_import, division, print_function
  import re
  from functools import partial
  from tornado import httputil
  from tornado.httpserver import _CallableAdapter
  from tornado.escape import url_escape, url_unescape, utf8
  from tornado.log import app_log
  from tornado.util import basestring_type, import_object, re_unescape, unicode_type
label_desc: Use image node_id 5 for calling the _RoutingDelegate obj's underlying member method code with example usage: obj.on_connection_close() without return types