// just because another participant imported.
state.getLastModifiedMillis(),
importingUser.getAddress());
log.info(importingUser + " is not a participant at version "
+ stateAndVersion.getVersion() + ", adding " + op);
MutationLog.Appender appender = l.prepareAppender().getAppender();
try {
appender.append(
new ChangeData<String>(getFakeClientId(), SERIALIZER.serializeDelta(op)));
} catch (ChangeRejected e) {
throw new RuntimeException("Appender rejected AddParticipant: " + op);