Question about UI Interfaces and Events

Hi!

I'm really liking the new UI system so far, for now mostly because it is super easy to create debug controls and mock up temp controls for prototypes. There are two things I'm really curious about:

1) How does the UI system find the instances that implement the different interfaces (e.g. IPointerDownHandler). Does the RectTransform try to find them in Start or does the editor scan all the components before the game gets compiled?

2) I have a sneaking suspicion that the event system for...

Question about UI Interfaces and Events