code: def _create_connection(self, stream):
      stream.set_nodelay(True)
      connection = HTTP1Connection(
          stream,
          True,
          HTTP1ConnectionParameters(
              no_keep_alive=True,
              max_header_size=self.max_header_size,
              max_body_size=self.max_body_size,
              decompress=self.request.decompress_response,
          ),
          self._sockaddr,
      )
      return connection
  
imports: from __future__ import absolute_import, division, print_function
  from tornado.escape import utf8, _unicode
  from tornado import gen
  from tornado.httpclient import HTTPResponse, HTTPError, AsyncHTTPClient, main, _RequestProxy
  from tornado import httputil
  from tornado.http1connection import HTTP1Connection, HTTP1ConnectionParameters
  from tornado.iostream import StreamClosedError
  from tornado.netutil import Resolver, OverrideResolver, _client_ssl_defaults
  from tornado.log import gen_log
  from tornado import stack_context
  from tornado.tcpclient import TCPClient
  from tornado.util import PY3
  import base64
  import collections
  import copy
  import functools
  import re
  import socket
  import sys
  from io import BytesIO
label_desc: Use image node_id 6 for calling the _HTTPConnection obj's underlying member method code with example usage: obj._create_connection(stream) and returns: connection