'Figures out the ids of the given activities and forwards
The removal to the remove_from_storage function
:param activities: the list of activities'

def remove_many(self, activities, *args, **kwargs):

    self.metrics.on_feed_remove(self.__class__, len(activities))
    if (activities and isinstance(activities[0], (six.string_types, six.integer_types, uuid.UUID))):
        activity_ids = activities
    else:
        activity_ids = list(self.serialize_activities(activities).keys())
    return self.remove_from_storage(activity_ids, *args, **kwargs)
