libphonenumber\PhoneMetadata::intlNumberFormats PHP Method

    public function intlNumberFormats()
    {
        return $this->intlNumberFormat;
    }

 private function formatNsn($number, PhoneMetadata $metadata, $numberFormat, $carrierCode = null)
 {
     $intlNumberFormats = $metadata->intlNumberFormats();
     // When the intlNumberFormats exists, we use that to format national number for the
     // INTERNATIONAL format instead of using the numberDesc.numberFormats.
     $availableFormats = count($intlNumberFormats) == 0 || $numberFormat == PhoneNumberFormat::NATIONAL ? $metadata->numberFormats() : $metadata->intlNumberFormats();
     $formattingPattern = $this->chooseFormattingPatternForNumber($availableFormats, $number);
     return $formattingPattern === null ? $number : $this->formatNsnUsingPattern($number, $formattingPattern, $numberFormat, $carrierCode);
 }