def split_iterable_as_iterable(self, values):
        values = iter(enumerate(values))
        cache = dict()
        def get_value(ti):
            try:
                return cache.pop(ti)
            except:
                while True:
                    i, v = next(values)
                    if i==ti:
                        return v
                    cache[i] = v
        s = iter(self.index.sorter)
        for c in self.count:
            yield (get_value(i) for i in itertools.islice(s, int(c)))