- addEdge
Adds nodeV as a new successor of nodeU, and edge as a new outgoing edge of
nodeU. Requirements: * n
- addNode
May only be called if one of the following conditions holds: * the tree is empty
(in this case no
- nodes
- inEdges
- predecessor
- removeNode
Removes all nodes from the subtree rooted at node, so that this graph continues
to be a rooted tree.
- root