}
public void addTransferFile(SSTableReader sstable, long estimatedKeys, List<Pair<Long, Long>> sections)
{
assert sstable != null && cfId.equals(sstable.metadata.cfId);
FileMessage message = new FileMessage(sstable, sequenceNumber.getAndIncrement(), estimatedKeys, sections);
files.put(message.header.sequenceNumber, message);
totalSize += message.header.size();
}