docs: @Override
    public boolean adjustEntry(MkAppEntry entry, DBID routingObjectID, double parentDistance, AbstractMTree<O, MkAppTreeNode<O>, MkAppEntry, ?> mTree) {
      super.adjustEntry(entry, routingObjectID, parentDistance, mTree);
      // entry.setKnnDistanceApproximation(knnDistanceApproximation());
      return true; // TODO: improve
    }