Asset.php

if ($filter == 'min') {
    if ($hint == 'js') {
        $filter = new JsMinFilter();
    } elseif ($hint == 'css') {
        $filter = new CssMinFilter();
    }
} elseif ($filter == 'less') {
    if ($this->config->get('streams::assets.filters.less') == 'php') {
        $filter = new LessFilter($this->parser);
    } else {
        $filter = new NodeLessFilter($this->parser);
    }
} elseif ($filter == 'parse') {
    $filter = new ParseFilter($this->parser);
} elseif ($filter == 'scss') {
    if ($this->config->get('streams::assets.filters.scss') == 'php') {
        $filter = new ScssFilter($this->parser);
    } else {
        $filter = new RubyScssFilter($this->parser);
    }
} elseif ($filter == 'styl') {
    $filter = new StylusFilter($this->parser);
} elseif ($filter == 'coffe') {
    $filter = new CoffeeFilter($this->parser);
} elseif ($filter == 'embed') {
    $filter = new PhpCssEmbedFilter();
} elseif ($filter != 'glob') {
    unset($filters[$k]);
}