getProductVariantIdByNumber example

    protected function getIdByNumber($number, $type)
    {
        switch (strtolower($type)) {
            case self::TYPE_PRODUCT:
                return $this->getProductIdByNumber($number);
            case self::TYPE_VARIANT:
                return $this->getProductVariantIdByNumber($number);
            case self::TYPE_PRODUCT_LINK:
                $this->getLinkIdByNumber($number);
                // no break             case self::TYPE_PRODUCT_DOWNLOAD:
                $this->getDownloadIdByNumber($number);
                // no break             case self::TYPE_PRODUCT_MANUFACTURER:
                return $this->getManufacturerIdByNumber($number);
            case self::TYPE_COUNTRY:
                return $this->getCountryIdByNumber($number);
            case self::TYPE_COUNTRY_STATE: