code: func isPossibleNumberWithRegion(number, regionDialingFrom string) bool {
  	num, err := Parse(number, regionDialingFrom)
  	if err != nil {
  		return false
  	}
  	return IsPossibleNumber(num)
  }
docs: // Check whether a phone number is a possible number given a number in the
  // form of a string, and the region where the number could be dialed from.
  // It provides a more lenient check than IsValidNumber(). See
  // IsPossibleNumber(PhoneNumber) for details.
  //
  // This method first parses the number, then invokes
  // IsPossibleNumber(PhoneNumber) with the resultant PhoneNumber object.