SortedMapIterator smi = new SortedMapIterator(tm1);
TestDataSource tds = new TestDataSource(smi);
SourceSwitchingIterator ssi = new SourceSwitchingIterator(tds, false);
SortedKeyValueIterator<Key,Value> dc1 = ssi.deepCopy(null);
TreeMap<Key,Value> tm2 = new TreeMap<Key,Value>();
put(tm2, "r1", "cf1", "cq1", 6, "v3");
put(tm2, "r2", "cf1", "cq2", 6, "v4");