/**
  * @return Bootstrap
  * @since 2.1.0
  */
 public static function getBooster()
 {
     if (null === self::$_instance) {
         // Lets find inside current module
         $module = Yii::app()->getController()->getModule();
         if ($module) {
             if ($module->hasComponent('booster')) {
                 self::$_instance = $module->getComponent('booster');
             }
         }
         // Still nothing?
         if (null === self::$_instance) {
             if (Yii::app()->hasComponent('booster')) {
                 self::$_instance = Yii::app()->getComponent('booster');
             }
         }
     }
     return self::$_instance;
 }