public TreePrinter() { if (ShowFilter == null) { ShowFilter = new DefaultShowFilter <TKey, TNode, TLeaf>(); } }
// public TreeWorker() { if (buildFilter == null) { buildFilter = new DefaultBuildFilter <TKey, TNode, TLeaf>(); } if (showFilter == null) { showFilter = new DefaultShowFilter <TKey, TNode, TLeaf>(); } }