# parentPreorderEnumeration

abstract fun parentPreorderEnumeration(parent: N): Iterable<N>

Creates and returns an iterable that traverses the subhierarchy rooted at the give node in preorder. Only non-leaf nodes are included. The first node returned by the iterator's next() method is the given node.

#### Return

an iterable that traverses the subtree rooted at this node in preorder.

#### Parameters

parent

the root of the hierarchy to traverse