def _is_notify_empty(notify_db):
    """
    notify_db is considered to be empty if notify_db is None and neither
    of on_complete, on_success and on_failure have values.
    """
    if not notify_db:
        return True
    return not (notify_db.on_complete or notify_db.on_success or notify_db.on_failure)

    notify_db is considered to be empty if notify_db is None and neither
    of on_complete, on_success and on_failure have values.
    
st2common/st2common/services/action.py