@NotNull
  private FlattenModulesToggleAction createFlattenModulesAction() {
    return new FlattenModulesToggleAction(myProject, () -> mySettings.UI_SHOW_MODULES, () -> !mySettings.UI_SHOW_MODULE_GROUPS, (value) -> {
      DependencyUISettings.getInstance().UI_SHOW_MODULE_GROUPS = !value;
      mySettings.UI_SHOW_MODULE_GROUPS = !value;
      rebuild();
    });
  }
@NotNull
  private FlattenModulesToggleAction createFlattenModulesAction()