private StoreFilterField<GPSimpleUser> createServerFilter(
     StoreFilterField<GPSimpleUser> storeFilterField,
     ListStore<GPSimpleUser> store,
     String filterLabel) {
   storeFilterField =
       new StoreFilterField<GPSimpleUser>() {
         @Override
         protected boolean doSelect(
             Store<GPSimpleUser> store,
             GPSimpleUser parent,
             GPSimpleUser record,
             String property,
             String filter) {
           String name = record.getName().toString().toLowerCase();
           if (name.contains(filter.toLowerCase())) {
             return Boolean.TRUE;
           }
           return Boolean.FALSE;
         }
       };
   storeFilterField.setEmptyText("Type the user to filter");
   storeFilterField.bind(store);
   storeFilterField.setFieldLabel(filterLabel);
   return storeFilterField;
 }
  /**
   * Creates, configures and adds the components palette toolbar.<br>
   *
   * @param componentsReceiver
   */
  private void addToolbar() {
    // the toolbar
    ToolBar gridToolBar = new ToolBar();
    setTopComponent(gridToolBar);

    SelectionListener<ButtonEvent> ttiAddListener =
        new SelectionListener<ButtonEvent>() {
          @Override
          public void componentSelected(ButtonEvent ce) {
            GridSelectionModel<PaletteModelData> selectionModel = gComponents.getSelectionModel();
            List<PaletteModelData> lSelected = selectionModel.getSelectedItems();
            if (!lSelected.isEmpty()) {
              componentsReceiver.receiveComponents(lSelected);
              hide();
              selectionModel.deselectAll();
              ttiAddSelected.disable();
            }
          }
        };
    ttiAddSelected =
        buttonsSupport.addGenericButton(
            pmsMessages.labelAddSelected(), styles.iNew(), gridToolBar, ttiAddListener);
    ttiAddSelected.disable();

    gridToolBar.add(new FillToolItem());

    StoreFilterField<PaletteModelData> filter =
        new CustomizableStoreFilter<PaletteModelData>(
            Arrays.asList(
                new String[] {
                  PaletteModelData.PROPERTY_NAME, PaletteModelData.PROPERTY_DESCRIPTION
                }));
    filter.setHideLabel(false);
    filter.setFieldLabel(messages.labelFilter());
    filter.bind(sGrid);
    gridToolBar.add(filter);

    setTopComponent(gridToolBar);
  }