docs: protected CmsPushButton createSelectButton(A_SelectionHandler selectionHandler) {
  
          CmsPushButton selectButton = new CmsPushButton();
          selectButton.setImageClass(I_CmsButton.SEARCH_SMALL);
          selectButton.setTitle(Messages.get().key(Messages.GUI_TAB_SEARCH_SEARCH_EXISTING_0));
          selectButton.setButtonStyle(ButtonStyle.FONT_ICON, null);
          selectionHandler.setSelectButton(selectButton);
          selectButton.addClickHandler(selectionHandler);
          return selectButton;
      }