Class NotifyOrdered

src/DeferredGroup.java:91–104

    // Callback that preserves the original orders of the Deferreds.
    final class NotifyOrdered<T> implements Callback<T, T> {
      private final int index;
      NotifyOrdered(int index) {
        this.index = index;
      }
      public T call(final T arg) {
        recordCompletion(arg, index);
        return arg;
      }
      public String toString() {
        return "notify #" + index + " DeferredGroup@"
          + DeferredGroup.super.hashCode();
      }
    };

    if (ordered) {
      int i = 0;