private void addToggle(Toggle toggle) {
    final ToolItem button = new ToolItem(mLayoutToolBar, SWT.CHECK);

    URL iconUrl = toggle.getIconUrl();
    String title = toggle.getTitle();
    if (iconUrl != null) {
      button.setImage(IconFactory.getInstance().getIcon(iconUrl));
      button.setToolTipText(title);
    } else {
      button.setText(title);
    }
    button.setData(toggle);

    button.addSelectionListener(
        new SelectionAdapter() {
          @Override
          public void widgetSelected(SelectionEvent e) {
            Toggle toggle = (Toggle) button.getData();
            toggle
                .getCallback()
                .action(toggle, getSelectedNodes(), toggle.getId(), button.getSelection());
            updateSelection();
          }
        });
    if (toggle.isChecked()) {
      button.setSelection(true);
    }
  }