Unable to create phone number from country code + national number

[twocs]

For example, from my webform, I might have the country calling code "+1" and the national number "202456111". What is the expected way to go from that to a parsed phonenumber?

The Java version of libphonenumber allows creation of a number like this:

    PhoneNumber numberA = new PhoneNumber();
    numberA.setCountryCode(1).setNationalNumber(2024561111L);

But for using nyaruka/phonenumbers I don't see any pattern for creating a number from a separate country code and national number. There aren't any setters. Checking GitHub, I'm seeing code that basically concatenates the two strings together, but this involves some trimming and adding a + if not present.

countryCode := "+1"
nationalNumber := "2024561111"
concatenatedNumber := fmt.Sprintf("%s%s", countryCode, nationalNumber)
phonenumber, err := phonenumbers.Parse(concatenatedNumber, "")

Am I missing the intended way to create a phonenumber from countryCode + nationalNumber? Is it to convert country code to region instead of setting the values directly, e.g.

package main

import (
	"fmt"

	"github.com/nyaruka/phonenumbers"
)

func main() {
	countryCode := 1
	nationalNumber := "202 456 1111"
	regionCode := phonenumbers.GetRegionCodeForCountryCode(countryCode)
	p, err := phonenumbers.Parse(nationalNumber, regionCode)
	fmt.Println("Hello,", phonenumbers.IsValidNumber(p), err)
}

In other words, shouldn't there be something like the SetCountryCode and SetNationalNumber in this library?