public static < S extends Iterable < ? extends T > , T > Iterator < T > iteratorOverIterables ( Iterable < S > iterablesIterable ) { Objects . requireNonNull ( iterablesIterable , "The iterablesIterable is null" ) ; return iteratorOverIterables ( iterablesIterable . iterator ( ) ) ; }
Returns an iterator that combines the iterators that are returned by the iterables that are provided by the iterator that is provided by the given iterable