public void mutateMany(Map<String, Map<StaticBuffer, KCVMutation>> mutations, StoreTransaction txh) throws StorageException {
Preconditions.checkNotNull(mutations);
final Timestamp timestamp = getTimestamp(txh);
ConsistencyLevel consistency = getTx(txh).getWriteConsistencyLevel().getThriftConsistency();
// Generate Thrift-compatible batch_mutate() datastructure
// key -> cf -> cassmutation
int size = 0;
for (Map<StaticBuffer, KCVMutation> mutation : mutations.values()) size += mutation.size();