code: public boolean adjustEntry(E entry, DBID routingObjectID, double parentDistance, AbstractMTree<O, N, E, ?> mTree) {
      boolean changed = entry.setRoutingObjectID(routingObjectID);
      changed |= entry.setParentDistance(parentDistance);
      changed |= entry.setCoveringRadius(coveringRadiusFromEntries(routingObjectID, mTree));
      return changed;
    }
docs: Adjusts the parameters of the entry representing this node (e.g. after
  insertion of new objects). Subclasses may need to overwrite this method.
  
  @param entry the entry representing this node
  @param routingObjectID the id of the (new) routing object of this node
  @param parentDistance the distance from the routing object of this node to
  the routing object of the parent node
  @param mTree the M-Tree object holding this node
  @return {@code true} if adjustment of parent is needed