@Override
  public void writeChildConstraints(final XmlWriter writer, final RadComponent child) {
    // Constraints of XY layout
    writer.startElement("xy");
    try{
      writer.addAttribute("x", child.getX());
      writer.addAttribute("y", child.getY());
      writer.addAttribute("width", child.getWidth());
      writer.addAttribute("height", child.getHeight());
    }finally{
      writer.endElement(); // xy
    }
  }
@Override
  public void writeChildConstraints(final XmlWriter writer, final RadComponent child)