'Removes feeds\' entries that belong to target_ids from the
corresponding feeds of user_id.
:param user_id: the user which is doing the unfollowing
:param target_ids: the users to unfollow
:param async: controls if the operation should be done via celery'

def unfollow_many_users(self, user_id, target_ids, async=True):

    if async:
        unfollow_many_fn = unfollow_many.delay
    else:
        unfollow_many_fn = unfollow_many
    unfollow_many_fn(self, user_id, target_ids)
