public function getYiiWheels()
    {
        if (self::$_wheels === null) {
            self::$_wheels = Yii::app()->getComponent('yiiwheels');
        }
        return self::$_wheels;
    }
public function getYiiWheels()
    {
        if (self::$_wheels === null) {
            self::$_wheels = Yii::app()->getComponent('yiiwheels');
        }
        return self::$_wheels;
    }
public function getYiiWheels ( ) { if ( self :: $ _wheels === null ) { self :: $ _wheels = Yii :: app ( ) -> getComponent ( 'yiiwheels' ) ; } return self :: $ _wheels ; }
Returns the main component
@return YiiWheels
Returns the main component