public ModifiableRootModel getModifiableRootModel() {
    if (myModifiableRootModel == null) {
      final Module module = getModule();
      if (module != null) {
        MutableEntityStorage builder = myModulesProvider.getWorkspaceEntityStorageBuilder();
        myModifiableRootModel = ModuleRootManagerEx.getInstanceEx(module).getModifiableModelForMultiCommit(new UIRootConfigurationAccessor(myProject, builder));
      }
    }
    return myModifiableRootModel;
  }
public ModifiableRootModel getModifiableRootModel()