| BuildTNode, TItem(TNode, FuncTNode, IEnumerableTItem, NullableInt32) | Build tree from parent/root node. Uses function to retrieve child items. |
| BuildTNode, TItem, TSNode(TNode, TSNode, FuncTSNode, IReadOnlyListTSNode, FuncTSNode, TItem, Int32) | Build tree from parent/root node using arbitrary hierarchical source. Uses functions to retrieve source children and map items. |