code: public static <V> PnkyPromise<V> immediatelyComplete()
    {
      final Pnky<V> pnky = create();
      pnky.resolve(null);
      return pnky;
    }
docs: Creates a new {@link PnkyPromise future} that is successfully completed with a {@code null}
  value.
  
  @param <V>
  the type of future
  
  @return a new successfully completed {@link PnkyPromise future}