FromValuesAndTree creates a Tree[T1] with the given values, but borrowing the structure from the given tree (but ignoring the tree's values).

Map converts a Tree[T1] to a Tree[T2] by calling mapFn at every element.

New creates a new empty tree.

NewLeaf creates a new leaf node with the given value.

ValuesAsList extracts the leaf values of Tree into a list.

DefaultTreePath is used whenever an empty treePath is given.

Tree represent both a root of a tree, and a tree node.

Path is usually used as the path from the root node.