Stringy\Stringy::supportsEncoding PHP Method

    private function supportsEncoding()
    {
        $supported = array('UTF-8' => true, 'ASCII' => true);
        if (isset($supported[$this->encoding])) {
            return true;
        } else {
            throw new \RuntimeExpception('Stringy method requires the ' . 'mbstring module for encodings other than ASCII and UTF-8');
        }
    }