public function __construct(array $grid, array $properties = null)
 {
     if (!empty($properties)) {
         $properties["grid"] = $grid;
     } else {
         $properties = array("grid" => $grid);
     }
     parent::__construct($properties);
 }
 public function __construct($labelWidth, array $properties = null)
 {
     if (!empty($properties)) {
         $properties["labelWidth"] = $labelWidth;
     } else {
         $properties = array("labelWidth" => $labelWidth);
     }
     parent::__construct($properties);
 }