Solved Where did Pocketmine/Math go?

Where did the PocketMine/Math folder go? I feel like I'm loosing my mind. There are so many Pocketmine files that Call the math folder... but I can not see it in GitHub, and my plugins are complaining methods that exist in (for example) "AxisAlignedBB" are undefined.

Am I dumb? Am I missing something? lol. help.

 

It's now a composer library and thus has its own GitHub repo: https://github.com/pmmp/Math

 

Thank you!! It seems grow() was renamed. Git's blame is amazing.