@NotNull
  protected List<AnAction> createPopupMenuActions() {
    List<AnAction> actions = new ArrayList<>();
    actions.add(myShowDiffAction);
    ContainerUtil.addIfNotNull(actions, ActionManager.getInstance().getAction("Diff.ShowStandaloneDiff"));

    return actions;
  }
@NotNull
  protected List<AnAction> createPopupMenuActions()