Prado\Data\ActiveRecord\Relations\TActiveRecordRelationContext::isEmptyFkObject PHP Method

    protected function isEmptyFkObject($obj)
    {
        if (is_object($obj)) {
            return $obj instanceof TList ? $obj->count() === 0 : false;
        } else {
            if (is_array($obj)) {
                return count($obj) === 0;
            } else {
                return empty($obj);
            }
        }
    }