[LayaAirIDE 2.0]如何才能生成scene配套的代码

在demo里有个类TestSceneUI 请问如何才能生成
/**This class is automatically generated by LayaAirIDE, please do not make any modifications. */
package ui.test {
import laya.ui.*;
import laya.display.*;

public class TestSceneUI extends Scene {
public var scoreLbl:Label;
public var tipLbll:Label;

override protected function createChildren():void {
super.createChildren();
loadScene("test/TestScene");

}

}
}