Collectible Card Game Headquarters

Context: I'm a dev that has only recently learned of xMage and I'm trying to learn my way around the code.

Can a knowledgable dev point me in the right direction? I'm trying to figure out where in the code the color identity is determined for a double sided card. For example, if a card is white on the day side and red on the night side, the color identity should be but I can't figure out where that logic is.

I'm assuming there a centralized point in the code that color identity is determined based on the various rules (mana symbols in rules text, etc.)?

I thought I saw a bug report involving double faced cards and color identity the other day so I went looking for that and you might learn what you want from what LevelX2 fixed here until an actual dev gets around to giving you a better, proper response. If it doesn't really point you in the right direction then my bad, sorry for wasting your time.

That helped a lot, thanks!