'Gets many activities and deserializes them
:param activity_ids: the list of activity ids'

def get_many(self, activity_ids, *args, **kwargs):

    self.metrics.on_feed_read(self.__class__, len(activity_ids))
    activities_data = self.get_from_storage(activity_ids, *args, **kwargs)
    return self.deserialize_activities(activities_data)
