record(1, "Actor", "migrate", "Actor %s is migrating.", this);
verifyOnActorStrand();
migrating = true;
preMigrate();
Fiber.parkAndSerialize(new FiberWriter() {
@Override
public void write(Fiber fiber, ByteArraySerializer ser) {
final byte[] buf = ser.write(Actor.this);
new Fiber<Void>() {