public function getExtendedClassName()
    {
        if ($this->getExtendedClass() === null) {
            return '';
        }

        $name = str_replace('%', ' ', $this->getExtendedClass());
        $name = str_replace('.', ' ', $name);
        $name = str_replace(':', ' pseudo-class-', $name);
        return trim($name);
    }