@NotNull
  public ModifiableFacetModel getOrCreateModifiableModel(final Module module) {
    ModifiableFacetModel model = myModifiableModels.get(module);
    if (model == null) {
      model = FacetManager.getInstance(module).createModifiableModel();
      myModifiableModels.put(module, model);
    }
    return model;
  }
@NotNull
  public ModifiableFacetModel getOrCreateModifiableModel(final Module module)