public function testFormatWithCarrierCode()
 {
     // We only support this for AR in our test metadata, and only for mobile numbers starting with
     // certain values.
     $arMobile = new PhoneNumber();
     $arMobile->setCountryCode(54)->setNationalNumber(92234654321);
     $this->assertEquals("02234 65-4321", $this->phoneUtil->format($arMobile, PhoneNumberFormat::NATIONAL));
     // Here we force 14 as the carrier code.
     $this->assertEquals("02234 14 65-4321", $this->phoneUtil->formatNationalNumberWithCarrierCode($arMobile, "14"));
     // Here we force the number to be shown with no carrier code.
     $this->assertEquals("02234 65-4321", $this->phoneUtil->formatNationalNumberWithCarrierCode($arMobile, ""));
     // Here the international rule is used, so no carrier code should be present.
     $this->assertEquals("+5492234654321", $this->phoneUtil->format($arMobile, PhoneNumberFormat::E164));
     // We don't support this for the US so there should be no change.
     $this->assertEquals("650 253 0000", $this->phoneUtil->formatNationalNumberWithCarrierCode(self::$usNumber, "15"));
 }