code: async def process_message(self, message, wait=True):
          
  
          to_check = deque([self._waiters])
          ignored = True
  
          while len(to_check) > 0:
              context = to_check.popleft()
  
              waiters = context.get(OperationManager._LEAF, [])
              for waiter in waiters:
                  if isinstance(waiter, asyncio.Future):
                      waiter.set_result(message)
                  else:
                      try:
                          await _wait_or_launch(self._loop, waiter, message, wait)
                      except:  #pylint:disable=bare-except;We can't let a user callback break this routine
                          self._logger.warning("Error calling every_match callback, callback=%s, message=%s",
                                               waiter, message, exc_info=True)
  
                  ignored = False
  
              for key in context:
                  if key is OperationManager._LEAF:
                      continue
  
                  message_val = _get_key(message, key)
                  if message_val is _MISSING:
                      continue
  
                  next_level = context[key]
                  if message_val in next_level:
                      to_check.append(next_level[message_val])
  
          return not ignored
docs: Process a message to see if it wakes any waiters.
  
          This will check waiters registered to see if they match the given
          message.  If so, they are awoken and passed the message.  All matching
          waiters will be woken.
  
          This method returns False if the message matched no waiters so it was
          ignored.
  
          Normally you want to use wait=True (the default behavior) to guarantee
          that all callbacks have finished before this method returns.  However,
          sometimes that can cause a deadlock if those callbacks would
          themselves invoke behavior that requires whatever is waiting for this
          method to be alive.  In that case you can pass wait=False to ensure
          that the caller of this method does not block.
  
          Args:
              message (dict or object): The message that we should process
              wait (bool): Whether to block until all callbacks have finished
                  or to return once the callbacks have been launched.
  
          Returns:
              bool: True if at least one waiter matched, otherwise False.