# Hackage containers Authors - Data.Sequence (Highlights) ![rw-book-cover|256](https://readwise-assets.s3.amazonaws.com/static/images/article2.74d541386bbf.png) ## Highlights - The implementation uses 2-3 finger trees annotated with sizes ([View Highlight](https://read.readwise.io/read/01kj2t6njtx09yvx4990s5xm0p)) ^990643009