gistfile1.txt

if (!this.starts.hasNext()) {
            for (final Map.Entry<K, Iterator<V>> entry : byMap.entrySet()) {
                V2 previousReduceValue = this.reduceMap.get(entry.getKey());
                if (null == previousReduceValue)
                    this.reduceMap.put(entry.getKey(), reduceFunction.compute(entry.getValue()));
                else
                    this.reduceMap.put(entry.getKey(), reduceFunction.compute(new MultiIterator(entry.getValue(), new SingleIterator(previousReduceValue))));
            }
            this.byMap.clear();
        }