@5a5dfae4 this is basically all readonly, I probably could've used tuples everywhere. No reason why this couldn't work on a dynamically sized list though, it's very simple code.

Here _notes and _intervals are both instances of this class

https://cdn.fosstodon.org/media_attachments/files/111/060/021/301/922/031/original/365288aa3c830bf8.png