Component::getComponent exception formatting

> Then you should also be advocating that the method should be called findSubcomponents() which I dislike. 

Ah, yes! I do like that better. In this context I think "sub" means "below me" which is exactly what the method is doing. `findComponents()` to me sounds as though it should search all the components. I don't feel strongly about it, but I think it makes sense to emphasize the "below only" aspect of the search. I believe there are other contexts where components are searched more widely (like when making connections), in which case searching for a component is not the same as searching for a subcomponent.