Creates Dispatch models for a given message and return them.

        :param Message message: Message model instance
        :param list|None recipients: A list or Recipient objects
        :return: list of created Dispatch models
        :rtype: list

def prepare_dispatches(cls, message, recipients=None):
        """Creates Dispatch models for a given message and return them.

        :param Message message: Message model instance
        :param list|None recipients: A list or Recipient objects
        :return: list of created Dispatch models
        :rtype: list
        """
        return Dispatch.create(message, recipients or cls.get_subscribers())