public static @Nullable PopupHandler installToolbarCustomizationHandler(@NotNull ActionToolbar toolbar) {
    ActionGroup actionGroup = toolbar.getActionGroup();
    String groupID = getGroupID(actionGroup);
    if (groupID == null) {
      return null;
    }
    return installToolbarCustomizationHandler(actionGroup, groupID, toolbar.getComponent(), toolbar.getPlace());
  }
public static @Nullable PopupHandler installToolbarCustomizationHandler(@NotNull ActionToolbar toolbar)