public function __construct(AssetFactory $factory, $tag, $output, $single = false, array $extensions = array())
 {
     $this->factory = $factory;
     $this->tag = $tag;
     $this->output = $output;
     $this->single = $single;
     $this->extensions = $extensions;
     $this->injectedAssets = array();
     parent::__construct($factory, $tag, $output, $single, $extensions);
 }