Product::getLinkedProductsCriteria PHP Method

    public function getLinkedProductsCriteria($typeCode = null)
    {
        $criteria = new CDbCriteria();
        $criteria->join .= ' JOIN {{store_product_link}} linked ON t.id = linked.linked_product_id';
        $criteria->compare('linked.product_id', $this->id);
        if (null !== $typeCode) {
            $criteria->join .= ' JOIN {{store_product_link_type}} type ON type.id = linked.type_id';
            $criteria->compare('type.code', $typeCode);
        }
        return $criteria;
    }