'Removes the activities from the notification feed and marks them as read/seen.'

def remove_many_aggregated(self, aggregated, *args, **kwargs):

    super(BaseNotificationFeed, self).remove_many_aggregated(aggregated, *args, **kwargs)
    ids = [a.serialization_id for a in aggregated]
    self.update_markers(ids, ids, operation='remove')
