code: def deleteMessages(self, message_ids):
          
          message_ids = require_list(message_ids)
          data = dict()
          for i, message_id in enumerate(message_ids):
              data["message_ids[{}]".format(i)] = message_id
          r = self._post(self.req_url.DELETE_MESSAGES, data)
          return r.ok
docs: Deletes specifed messages
  
          :param message_ids: Message IDs to delete
          :return: Whether the request was successful
          :raises: FBchatException if request failed