ServiceNow How to get country from Phone Number

We can use this GlideElementPhoneNumber method to get the country from phone number.

var gePN = new GlideElementPhoneNumber();  
// if we have a valid number, parse it 
var valid = gePN.setPhoneNumber("+" + '15406871234', false);
if (valid) {   
var country = gePN.getTerritory();  
gs.log(country);
}

Output: North America

Above code is verified using global scope.

P.S: looks like GlideElementPhoneNumber is undocumented method, I could not find anything on SN docs site.