code: protected void registerWindowAttributes() {
          addAttributeProcessor(new KeepWithinStageLmlAttribute(), "keepWithinStage", "keepWithin");
          addAttributeProcessor(new ModalLmlAttribute(), "modal");
          addAttributeProcessor(new MovableLmlAttribute(), "movable");
          addAttributeProcessor(new ResizeableLmlAttribute(), "resizeable", "resizable");
          addAttributeProcessor(new ResizeBorderLmlAttribute(), "resizeBorder", "border");
          addAttributeProcessor(new TitleAlignmentLmlAttribute(), "titleAlign", "titleAlignment");
          addAttributeProcessor(new TitleLmlAttribute(), "title");
      }
docs: Window widget attributes.