libphonenumber\PhoneMetadata::setFixedLine PHP Method

    public function setFixedLine(PhoneNumberDesc $value)
    {
        $this->fixedLine = $value;
        return $this;
    }

 private static function loadGeneralDesc(PhoneMetadata $metadata, \DOMElement $element)
 {
     $generalDesc = new PhoneNumberDesc();
     $generalDesc = self::processPhoneNumberDescElement($generalDesc, $element, self::GENERAL_DESC);
     $metadata->setGeneralDesc($generalDesc);
     $metadata->setFixedLine(self::processPhoneNumberDescElement($generalDesc, $element, self::FIXED_LINE));
     $metadata->setMobile(self::processPhoneNumberDescElement($generalDesc, $element, self::MOBILE));
     $metadata->setStandardRate(self::processPhoneNumberDescElement($generalDesc, $element, self::STANDARD_RATE));
     $metadata->setPremiumRate(self::processPhoneNumberDescElement($generalDesc, $element, self::PREMIUM_RATE));
     $metadata->setShortCode(self::processPhoneNumberDescElement($generalDesc, $element, self::SHORT_CODE));
     $metadata->setTollFree(self::processPhoneNumberDescElement($generalDesc, $element, self::TOLL_FREE));
     $metadata->setSharedCost(self::processPhoneNumberDescElement($generalDesc, $element, self::SHARED_COST));
     $metadata->setVoip(self::processPhoneNumberDescElement($generalDesc, $element, self::VOIP));
     $metadata->setPersonalNumber(self::processPhoneNumberDescElement($generalDesc, $element, self::PERSONAL_NUMBER));
     $metadata->setPager(self::processPhoneNumberDescElement($generalDesc, $element, self::PAGER));
     $metadata->setUan(self::processPhoneNumberDescElement($generalDesc, $element, self::UAN));
     $metadata->setEmergency(self::processPhoneNumberDescElement($generalDesc, $element, self::EMERGENCY));
     $metadata->setVoicemail(self::processPhoneNumberDescElement($generalDesc, $element, self::VOICEMAIL));
     $metadata->setCarrierSpecific(self::processPhoneNumberDescElement($generalDesc, $element, self::CARRIER_SPECIFIC));
     $metadata->setNoInternationalDialling(self::processPhoneNumberDescElement($generalDesc, $element, self::NO_INTERNATIONAL_DIALLING));
     $metadata->setSameMobileAndFixedLinePattern($metadata->getMobile()->getNationalNumberPattern() === $metadata->getFixedLine()->getNationalNumberPattern());
 }