public FPSTextureView addChild(@NonNull DisplayBase DisplayObject){
  DisplayObject.setUp(mFps);
  mDisplayList.add(DisplayObject);
  return this;
}

public FPSTextureView addChild ( @ NonNull DisplayBase DisplayObject ) { DisplayObject . setUp ( mFps ) ; mDisplayList . add ( DisplayObject ) ; return this ; }
adds a child to the top of the display list .
