}
public LoggerOperation logManyTablets(List<TabletMutations> mutations) throws IOException {
List<Pair<LogFileKey, LogFileValue>> data = new ArrayList<Pair<LogFileKey, LogFileValue>>();
for (TabletMutations tabletMutations : mutations) {
LogFileKey key = new LogFileKey();
key.event = MANY_MUTATIONS;
key.seq = tabletMutations.getSeq();
key.tid = tabletMutations.getTid();
LogFileValue value = new LogFileValue();
value.mutations = tabletMutations.getMutations();