libphonenumber\PhoneNumberDesc::addPossibleLengthLocalOnly PHP Method

    public function addPossibleLengthLocalOnly($possibleLengthLocalOnly)
    {
        if (!in_array($possibleLengthLocalOnly, $this->possibleLengthLocalOnly)) {
            $this->possibleLengthLocalOnly[] = $possibleLengthLocalOnly;
        }
    }