golang-github-tidwall-btree-dev 0.0~git20191029.400434d-3 (ppc64el binary) in ubuntu hirsute

 This package provides an in-memory B-Tree implementation for Go, useful
 as an ordered, mutable data structure.
 .
 This is a fork of the wonderful google/btree package. It's has all the same
 great features and adds a few more.
 .
  * Descend* functions for iterating backwards.
  * Iteration performance boost.
  * User defined context.
 .
 User defined context is a great new feature that allows for entering
 the same item into multiple B-trees, and each B-tree have a different
 ordering formula.