public void initExtraButtons(
     final ExtendedPagedTable<ProcessInstanceSummary> extendedPagedTable) {
   Button newInstanceButton = new Button();
   newInstanceButton.setTitle(constants.New_Instance());
   newInstanceButton.setIcon(IconType.PLUS);
   newInstanceButton.setTitle(Constants.INSTANCE.New_Instance());
   newInstanceButton.addClickHandler(
       new ClickHandler() {
         @Override
         public void onClick(ClickEvent event) {
           newProcessInstancePopup.show();
         }
       });
   extendedPagedTable.getRightActionsToolbar().add(newInstanceButton);
 }