docs: void showSourcesWindow(String resource) {
  
          final Window window = CmsBasicDialog.prepareWindow(DialogWidth.wide);
          CmsSourceDialog sourceDialog = new CmsSourceDialog(m_manager, new Runnable() {
  
              public void run() {
  
                  window.close();
              }
          });
          sourceDialog.setSource(resource);
          window.setCaption(CmsVaadinUtils.getMessageText(Messages.GUI_SEARCHINDEX_INDEXSOURCE_SHOW_1, resource));
          window.setContent(sourceDialog);
          UI.getCurrent().addWindow(window);
      }