@Override
  protected void execute(@NotNull final Project project,
                         @NotNull Collection<HgRepository> repositories,
                         @Nullable HgRepository selectedRepo, @NotNull DataContext dataContext) {
    execute(project, repositories, selectedRepo, "");
  }
@Override
  protected void execute(@NotNull final Project project,
                         @NotNull Collection<HgRepository> repositories,
                         @Nullable HgRepository selectedRepo, @NotNull DataContext dataContext)