add_ten.java

public static final Object addTen(int n, Continuation continuation) {
    switch (continuation.label) {
        case 0: {
            continuation.n = n;
            continuation.label = 1;

            if (delay(1000L, continuation) == COROUTINE_SUSPENDED) 
                return COROUTINE_SUSPENDED;
        }
        case 1: {
            n = continuation.n;
        }
        default: {
            throw new IllegalStateException();
        }
    }
    return n + 10;
}