code: @Override
    protected MkAppEntry createNewDirectoryEntry(MkAppTreeNode<O> node, DBID routingObjectID, double parentDistance) {
      return new MkAppDirectoryEntry(routingObjectID, parentDistance, node.getPageID(), node.coveringRadiusFromEntries(routingObjectID, this), null);
    }
docs: Creates a new directory entry representing the specified node.
  
  @param node the node to be represented by the new entry
  @param routingObjectID the id of the routing object of the node
  @param parentDistance the distance from the routing object of the node to
  the routing object of the parent node