@ApiStatus.Internal
  static UpdatableIndex<Integer, SerializedStubTree, FileContent, ?> getStubUpdatingIndex() {
    return ((FileBasedIndexEx)FileBasedIndex.getInstance()).getIndex(StubUpdatingIndex.INDEX_ID);
  }
@ApiStatus.Internal
  static UpdatableIndex<Integer, SerializedStubTree, FileContent, ?> getStubUpdatingIndex()