libphonenumber\PhoneNumberDesc::getNationalNumberPattern PHP Method

    public function getNationalNumberPattern()
    {
        return $this->nationalNumberPattern;
    }

 public function isNumberMatchingDesc($nationalNumber, PhoneNumberDesc $numberDesc)
 {
     $nationalNumberPatternMatcher = new Matcher($numberDesc->getNationalNumberPattern(), $nationalNumber);
     return $this->isNumberPossibleForDesc($nationalNumber, $numberDesc) && $nationalNumberPatternMatcher->matches();
 }