getCountryCodeSource() public method

Returns the country code source of this phone number.
public getCountryCodeSource ( ) : integer | null
return integer | null A CountryCodeSource constant, or null if not set.
 private function parse()
 {
     if ($this->phoneNumberProto) {
         // from phoneNumberProto
         $this->country_code = $this->phoneNumberProto->getCountryCode();
         $this->country_code_plus_sign = "+" . $this->country_code;
         $this->national_number = $this->phoneNumberProto->getNationalNumber();
         $this->extension = $this->phoneNumberProto->getExtension();
         $this->country_code_source = $this->phoneNumberProto->getCountryCodeSource();
         if (isset($this->countryCodeSourcesText[$this->country_code_source])) {
             $this->country_code_source_text = $this->countryCodeSourcesText[$this->country_code_source];
         }
         $this->raw_input = $this->phoneNumberProto->getRawInput();
         $this->preferred_domestic_carrier_code = $this->phoneNumberProto->getPreferredDomesticCarrierCode();
         // from validation
         $this->is_possible_number = $this->phoneUtil->isPossibleNumber($this->phoneNumberProto);
         $this->is_valid_number = $this->phoneUtil->isValidNumber($this->phoneNumberProto);
         $this->region_code_for_number = $this->phoneUtil->getRegionCodeForNumber($this->phoneNumberProto);
         $this->number_type = $this->phoneUtil->getNumberType($this->phoneNumberProto);
         $this->number_type_text = $this->phoneUtil->getNumberType($this->phoneNumberProto);
         if (isset($this->phoneNumberTypesText[$this->number_type])) {
             $this->number_type_text = $this->phoneNumberTypesText[$this->number_type];
         } else {
             $this->number_type_text = "OTHER";
         }
         $this->is_mobile_number = in_array($this->number_type, [PhoneNumberType::FIXED_LINE_OR_MOBILE, PhoneNumberType::MOBILE]);
         // from formatting
         $this->format_e164 = $this->phoneUtil->format($this->phoneNumberProto, PhoneNumberFormat::E164);
         $this->format_international = $this->phoneUtil->format($this->phoneNumberProto, PhoneNumberFormat::INTERNATIONAL);
         $this->format_national = $this->phoneUtil->format($this->phoneNumberProto, PhoneNumberFormat::NATIONAL);
         $this->format_rfc3966 = $this->phoneUtil->format($this->phoneNumberProto, PhoneNumberFormat::RFC3966);
         // from additional
         $phoneNumberOfflineGeocoder = PhoneNumberOfflineGeocoder::getInstance();
         $this->description = $phoneNumberOfflineGeocoder->getDescriptionForNumber($this->phoneNumberProto, 'en');
         $phoneNumberToCarrierMapper = PhoneNumberToCarrierMapper::getInstance();
         $this->carrier_name = $phoneNumberToCarrierMapper->getNameForNumber($this->phoneNumberProto, 'en');
         $phoneNumberToTimeZonesMapper = PhoneNumberToTimeZonesMapper::getInstance();
         $this->timezones = $phoneNumberToTimeZonesMapper->getTimeZonesForNumber($this->phoneNumberProto);
     }
 }