libphonenumber\NumberFormat::clear PHP 메소드

    public function clear()
    {
        $this->pattern = "";
        $this->format = "";
        $this->leadingDigitsPattern = array();
        $this->nationalPrefixFormattingRule = "";
        $this->nationalPrefixOptionalWhenFormatting = false;
        $this->domesticCarrierCodeFormattingRule = "";
        return $this;
    }