code: protected AbstractButton getDataEditorButton() {
          if (dataEditorButton == null) {
              dataEditorButton = getDataEditorCommand().createButton();
              dataEditorButton.setFocusable(false);
              //dataEditorButton.addFocusListener(createFocusListener());
          }
  
          return dataEditorButton;
      }
docs: Get/create the button to open the dataEditor in selection mode