function formatNationalNumberWithPreferredCarrierCode(number) {
	return formatNationalNumberWithCarrierCode(
		number,
		carrierCode
	);
}
Formats a phone number in national format for dialing using the carrier as
specified in the preferred_domestic_carrier_code field of the PhoneNumber
object passed in. If that is missing, use the {@code fallbackCarrierCode}
passed in instead. If there is no {@code preferred_domestic_carrier_code},
and the {@code fallbackCarrierCode} contains an empty string, return the
number in national format without any carrier code.

<p>Use {@link #formatNationalNumberWithCarrierCode} instead if the carrier
code passed in should take precedence over the number's
{@code preferred_domestic_carrier_code} when formatting.

@param {i18n.phonenumbers.PhoneNumber} number the phone number to be
    formatted.
@param {string} fallbackCarrierCode the carrier selection code to be used, if
    none is found in the phone number itself.
@return {string} the formatted phone number in national format for dialing
    using the number's preferred_domestic_carrier_code, or the
    {@code fallbackCarrierCode} passed in if none is found.