def unfollow(user, obj, send_action=False):
    check(obj)
    get_model('actstream', 'follow').objects.filter(
        user=user, object_id=obj.pk,
        content_type=ContentType.objects.get_for_model(obj)
    ).delete()
    if send_action:
        action.send(user, verb=_('stopped following'), target=obj)
Initialize CTTextRangeStep with start_time, end_time and step_count.
dataset/ETHPy150Open justquick/django-activity-stream/actstream/actions.py/unfollow--crossover with--dataset/ETHPy150Open lyda/chkcrontab/chkcrontab_lib.py/CTTextRangeStep.__init__