Returns a new supplier object. The items argument must be an array of objects over which the supplier iterates. The indexes argument is an array of index values with a one-to-one correspondence to the objects contained in the items array. The created supplier iterates over the arrays, returning elements of the values array in response to items messages, and elements of the indexes array in response to index messages. The supplier iterates for the number of items contained in the values array, returning .nil for any nonexistent items in either array.