@NotNull
  @Override
  protected DefaultActionGroup createPopupActionGroup(@NotNull JComponent button, @NotNull DataContext context) {
    DefaultActionGroup actionGroup = new DefaultActionGroup();

    for (final T item : myItems) {
      if (addSeparator(actionGroup, item)) {
        continue;
      }

      AnAction action = new AnAction() {
        @Override
        public void actionPerformed(@NotNull AnActionEvent e) {
          if (mySelection != item && selectionChanged(item)) {
            mySelection = item;
            AbstractComboBoxAction.this.update(item, myPresentation, false);
          }
        }
      };
      actionGroup.add(action);

      Presentation presentation = action.getTemplatePresentation();
      presentation.setIcon(mySelection == item ? CHECKED : null);
      update(item, presentation, true);
    }

    return actionGroup;
  }
@NotNull
  @Override
  protected DefaultActionGroup createPopupActionGroup(@NotNull JComponent button, @NotNull DataContext context)