static Library addLibrary(Sdk sdk) {
    final LibraryTable.ModifiableModel libraryTableModel = ModifiableModelsProvider.getInstance().getLibraryTableModifiableModel();
    final Library library = libraryTableModel.createLibrary(PythonFacetUtil.getFacetLibraryName(sdk.getName()));
    final Library.ModifiableModel model = library.getModifiableModel();
    for (String url : sdk.getRootProvider().getUrls(OrderRootType.CLASSES)) {
      model.addRoot(url, OrderRootType.CLASSES);
      model.addRoot(url, OrderRootType.SOURCES);
    }
    model.commit();
    libraryTableModel.commit();
    return library;
  }
static Library addLibrary(Sdk sdk)