While going through the documentation of this library, right on the first page I came across this text:
It looks like after 'very' a word or a piece of text is missing in the last line.PURPOSE
btree.library provides general purpose binary tree handling to
applications.
OVERVIEW
Binary trees keep data sorted in a way such that aribitrary nodes
can be added and looked up very, usually with O(log n) complexity.
This is how I spent my Pentacost-monday.
OldFart