code: def check_for_replay(name, names_to_seq_id, msg, config, context=None):
      
      prev_seq_id = names_to_seq_id.get(name, None)
      cur_seq_id = msg.get("seq_id", None)
  
      if prev_seq_id is None or cur_seq_id is None:
          return [msg]
  
      if cur_seq_id <= prev_seq_id:
          # Might have been delayed by network lag or something, in which case
          # we assume the replay has already been asked for and we dismiss it
          return []
  
      if cur_seq_id == prev_seq_id + 1 or prev_seq_id < 0:
          ret = [msg]
      else:
          ret = list(get_replay(name, {
              "seq_id_range": (prev_seq_id, cur_seq_id)
          }, config, context))
  
          if len(ret) == 0 or ret[-1]['seq_id'] < msg['seq_id']:
              ret.append(msg)
  
      names_to_seq_id[name] = cur_seq_id
  
      return ret
docs: Check to see if messages need to be replayed.
  
      Args:
          name (str): The consumer's name.
          names_to_seq_id (dict): A dictionary that maps names to the last seen sequence ID.
          msg (dict): The latest message that has arrived.
          config (dict): A configuration dictionary. This dictionary should contain, at a
              minimum, two keys. The first key, 'replay_endpoints', should be a dictionary
              that maps ``name`` to a ZeroMQ socket. The second key, 'io_threads', is an
              integer used to initialize the ZeroMQ context.
          context (zmq.Context): The ZeroMQ context to use. If a context is not provided,
              one will be created.
  
      Returns:
          list: A list of message dictionaries.