public static function filterSass(Node $node, $indent, $newLine)
    {

        if (!class_exists('Leafo\\ScssPhp\\Compiler'))
            throw new Compiler\Exception(
                "Failed to compile SASS: "
                ."Please install the leafo/scssphp composer package"
            );

        $sass = new \Leafo\ScssPhp\Compiler;
        $css = $sass->compile($node->text());

        return '<style>'.$newLine.$indent.$css.$newLine.$indent.'</style>';
    }