class_docstr: Wraps an `HTTPMessageDelegate` to decode ``Content-Encoding: gzip``.
class_docstr_tok: ["Wraps","an","`","HTTPMessageDelegate","`","to","decode","``","Content-Encoding",":","gzip","``","."]
code: def on_connection_close(self) -> None:
      return self._delegate.on_connection_close()
  
imports: import asyncio
  import logging
  import re
  import types
  from tornado.concurrent import Future, future_add_done_callback, future_set_result_unless_cancelled
  from tornado.escape import native_str, utf8
  from tornado import gen
  from tornado import httputil
  from tornado import iostream
  from tornado.log import gen_log, app_log
  from tornado.util import GzipDecompressor
  from typing import cast, Optional, Type, Awaitable, Callable, Union, Tuple
label_desc: Use image node_id 4 for calling the _GzipMessageDelegate obj's underlying member method code with example usage: obj.on_connection_close() and returns: self