Personally, I very much dislike that this makes the zero value of `SearchTree[T]` not useful. I personally feel that anything which only handles data (as oppose

Personally, I very much dislike that this makes the zero value of `SearchTree[T]` not useful. I personally feel that anything which only handles data (as opposed to something like an os.File) shouldn't require explicit initialization. I genuinely think I might personally converge on the `Comparator[T]` approach only (at least for types), for that reason.