gridBuilder.newSplitPanel(GridSize.COL50);
final FieldsetPanel fs = gridBuilder.newFieldset(getString("label.options")).suppressLabelForWarning();
final DivPanel checkBoxPanel = fs.addNewCheckBoxButtonDiv();
checkBoxPanel.add(new MyCheckBoxPanel(checkBoxPanel.newChildId(), new PropertyModel<Boolean>(getSearchFilter(), "notOpened"),
getString("task.status.notOpened")));
checkBoxPanel.add(new MyCheckBoxPanel(checkBoxPanel.newChildId(), new PropertyModel<Boolean>(getSearchFilter(), "opened"),
getString("task.status.opened")));
checkBoxPanel.add(new MyCheckBoxPanel(checkBoxPanel.newChildId(), new PropertyModel<Boolean>(getSearchFilter(), "closed"),
getString("task.status.closed")));
checkBoxPanel.add(new MyCheckBoxPanel(checkBoxPanel.newChildId(), new PropertyModel<Boolean>(getSearchFilter(), "deleted"),
getString("deleted")));