@Override
      public void endBatch() {
        if (StubIndexImpl.PER_FILE_ELEMENT_TYPE_STUB_CHANGE_TRACKING_SOURCE ==
            StubIndexImpl.PerFileElementTypeStubChangeTrackingSource.ChangedFilesCollector) {
          perFileElementTypeUpdateProcessor.endUpdatesBatch();
        }
      }
@Override
      public void endBatch()