League\CommonMark\Environment::getMiscExtension PHP Method

    private function getMiscExtension()
    {
        $lastExtension = end($this->extensions);
        if ($lastExtension !== false && $lastExtension instanceof MiscExtension) {
            return $lastExtension;
        }
        $miscExtension = new MiscExtension();
        $this->addExtension($miscExtension);
        return $miscExtension;
    }