code: def _locked_communicate(self, msg):
      self._channel.send(msg)
      response_ready = False
      while not response_ready:
          evt_list = self._poller.poll()
          for fd, _ in evt_list:
              if fd == self._channel.fileno():
                  # We deal with this last as this basically gives us the
                  # response, so we stop looking at things on stdout/stderr
                  response_ready = True
              # Readlines will never block here because `bufsize` is set to 1
              # (line buffering)
              elif fd == self._server_process.stdout.fileno():
                  sys.stdout.write(
                      self._server_process.stdout.readline()
                  )
              elif fd == self._server_process.stderr.fileno():
                  sys.stderr.write(
                      self._server_process.stderr.readline()
                  )
      # We make sure there is nothing left to read. On the server side a
      # flush happens before we respond, so we read until we get an exception;
      # this is non-blocking
      while True:
          try:
              line = self._server_process.stdout.readline()
              if not line:
                  break
              sys.stdout.write(line)
          except (OSError, TypeError):
              break
      while True:
          try:
              line = self._server_process.stderr.readline()
              if not line:
                  break
              sys.stderr.write(line)
          except (OSError, TypeError):
              break
      sys.stdout.flush()
      sys.stderr.flush()
      return self._channel.recv()
  
imports: import fcntl
  import gc
  import os
  import importlib
  import itertools
  import select
  from subprocess import Popen, PIPE
  import sys
  import threading
  import time
  from .None import data_transferer
  from .consts import FIELD_ARGS, FIELD_CONTENT, FIELD_KWARGS, FIELD_MSGTYPE, FIELD_OPTYPE, FIELD_TARGET, MSG_CONTROL, MSG_EXCEPTION, MSG_INTERNAL_ERROR, MSG_OP, MSG_REPLY, OP_GETMETHODS, VALUE_LOCAL, VALUE_REMOTE, CONTROL_GETEXPORTS, CONTROL_SHUTDOWN
  from .communication.channel import Channel
  from .communication.socket_bytestream import SocketByteStream
  from .data_transferer import DataTransferer, ObjReference
  from .exception_transferer import load_exception
  from .override_decorators import LocalAttrOverride, LocalException, LocalOverride
  from .stub import create_class
  from .utils import get_canonical_name
label_desc: Use image node_id 16 for calling the Client obj's underlying member method code with example usage: obj._locked_communicate(msg) and returns: self