return;
final Block block = newBlock();
block.setRootJid(rootJid);
rootJid = null;
writePending = true;
UniqueClock uc = UniqueClock.uc(getMailboxFactory());
UniqueTimestamp.req.send(this, uc, new RP<Long>() {
public void processResponse(Long response)
throws Exception {
block.setTimestamp(response);
(new ProcessBlock(block)).send(TransactionAggregator.this, blockFlowBuffer, new RP<Object>() {