Why does the following signature of `combineLatest...

# rx

[nhaarman]

Why does the following signature of combineLatest take in a Function<? super Object[]> instead of Function<? super T>?

public static <T, R> Observable<R> combineLatest(Iterable<? extends ObservableSource<? extends T>> sources,
            Function<? super Object[], ? extends R> combiner)