'Generate the bus notifications for the given message
:param message : the mail.message to sent
:returns list of bus notifications (tuple (bus_channe, message_content))'

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

    message_values = message.message_format()[0]
    notifications = []
    for channel in self:
        notifications.append([(self._cr.dbname, 'mail.channel', channel.id), dict(message_values)])
        if (channel.public == 'public'):
            notifications.append([channel.uuid, dict(message_values)])
    return notifications
