public @Nullable StructureViewBuilder getStructureViewBuilder(@NotNull PsiFile file) {
    PsiStructureViewFactory factory = forLanguage(file.getLanguage());
    if (factory != null) {
      return factory.getStructureViewBuilder(file);
    }
    return null;
  }
public @Nullable StructureViewBuilder getStructureViewBuilder(@NotNull PsiFile file)