'Broadcast the given message on the current channels.
Send the message on the Bus Channel (uuid for public mail.channel, and partner private bus channel (the tuple)).
A partner will receive only on message on its bus channel, even if this message belongs to multiple mail channel. Then \'channel_ids\' field
of the received message indicates on wich mail channel the message should be displayed.
:param : mail.message to broadcast'

@api.multi
def _notify(self, message):

    message.ensure_one()
    notifications = self._channel_message_notifications(message)
    self.env['bus.bus'].sendmany(notifications)
