New creates a tree printer and returns a sentinel node reference which should be used to add the root.

NewWithStyle creates a tree printer like New, permitting customization of the style of the resulting tree.

BulletStyle is a style that shows a bullet for each node, and groups any other lines under that bullet.

CompactStyle is a compact style, for deeper trees.

DefaultStyle is the default style.

Node is a handle associated with a specific depth in a tree.

Style is one of the predefined treeprinter styles.