for (Map.Entry<String, Map<StaticBuffer, KCVMutation>> keyMutation : mutations.entrySet()) {
String columnFamily = keyMutation.getKey();
for (Map.Entry<StaticBuffer, KCVMutation> mutEntry : keyMutation.getValue().entrySet()) {
StaticBuffer key = mutEntry.getKey();
ByteBuffer keyBB = key.asByteBuffer();
// Get or create the single Cassandra Mutation object responsible for this key
Map<String, List<org.apache.cassandra.thrift.Mutation>> cfmutation = batch.get(keyBB);
if (cfmutation == null) {
cfmutation = new HashMap<String, List<org.apache.cassandra.thrift.Mutation>>(3); // TODO where did the magic number 3 come from?