@Override
      public LookupStubEntriesByKeyTrace lookupStarted(final @NotNull IndexId<?, ?> indexId) {
        final LookupStubEntriesByKeyTrace trace = super.lookupStarted(indexId);

        indexValidationFinishedAtMs = -1;
        stubTreesDeserializingStarted = -1;

        //for re-entrant calls could be != this;
        return trace;
      }
@Override
      public LookupStubEntriesByKeyTrace lookupStarted(final @NotNull IndexId<?, ?> indexId)