Returns a KeyedIterable where each element is a Pair that combines the element of the current KeyedIterable and the provided Traversable

public function zip<Tu>(
  Traversable<Tu> $traversable,
): KeyedIterable<Tk, Pair<Tv, Tu>>;

If the number of elements of the KeyedIterable are not equal to the number of elements in the Traversable, then only the combined elements up to and including the final element of the one with the least number of elements is included.

@param $traversable - The Traversable to use to combine with the elements of the current KeyedIterable.

@return - The KeyedIterable that combines the values of the current KeyedItearable with the provided Traversable.