CheckBox checkAllCheckBox = new CheckBox(key);
CheckBox checkAllCheckBox = new CheckBox("checkAll");
  public PresentationObject getHeaderPresentationObject(    EntityPath entityPath,    EntityBrowser browser,    IWContext iwc) {    CheckBox checkAllCheckBox = new CheckBox(key);    checkAllCheckBox.setToCheckOnClick(key, "this.checked");    return checkAllCheckBox;  }