code: def onMarkedSeen(
          self, threads=None, seen_ts=None, ts=None, metadata=None, msg=None
      ):
          
          log.info(
              "Marked messages as seen in threads {} at {}s".format(
                  [(x[0], x[1].name) for x in threads], seen_ts / 1000
              )
          )
docs: Called when the client is listening, and the client has successfully marked threads as seen
  
          :param threads: The threads that were marked
          :param author_id: The ID of the person who changed the emoji
          :param seen_ts: A timestamp of when the threads were seen
          :param ts: A timestamp of the action
          :param metadata: Extra metadata about the action
          :param msg: A full set of the data recieved
          :type thread_type: models.ThreadType