def is_root_organization(obj):
    """
    Check whether this object(organization) is the root organization
    This check is performed based on whether this org's parent org is None
    According to current design, only root organization's parent org could
    not None
    :param obj: object to check
    :return: True if it's root organization, otherwise false
    """
    return obj is not None and obj.parent is None
