private void addListeners() {
    myMacrosList.getSelectionModel().addListSelectionListener(
      e -> {
        Item item = myMacrosList.getSelectedValue();
        if (item == null) {
          myPreviewTextarea.setText("");
          setOKActionEnabled(false);
        }
        else {
          myPreviewTextarea.setText(item.getPreview());
          setOKActionEnabled(true);
        }
      }
    );

    new DoubleClickListener() {
      @Override
      protected boolean onDoubleClick(@NotNull MouseEvent e) {
        if (getSelectedMacroName() != null) {
          close(OK_EXIT_CODE);
          return true;
        }
        return false;
      }
    }.installOn(myMacrosList);
  }
private void addListeners()