@Nullable
    private ModifiableModuleModel renameModule(String inputString) {
      final ModifiableModuleModel modifiableModel = ModuleManager.getInstance(myProject).getModifiableModel();
      try {
        modifiableModel.renameModule(myModule, inputString);
      }
      catch (ModuleWithNameAlreadyExists moduleWithNameAlreadyExists) {
        Messages.showErrorDialog(myProject, IdeBundle.message("error.module.already.exists", inputString),
                                 IdeBundle.message("title.rename.module"));
        return null;
      }
      return modifiableModel;
    }
@Nullable
    private ModifiableModuleModel renameModule(String inputString)