@Override
    protected @NotNull ChangesGroupingSupport installGroupingSupport() {
      ChangesGroupingSupport groupingSupport = new ChangesGroupingSupport(myProject, this, false);
      ChangesTree.installGroupingSupport(this, groupingSupport,
                                         () -> ShelveChangesManager.getInstance(myProject).getGrouping(),
                                         (newGrouping) -> ShelveChangesManager.getInstance(myProject).setGrouping(newGrouping));
      return groupingSupport;
    }
@Override
    protected @NotNull ChangesGroupingSupport installGroupingSupport()