Class BiFlatMap

future-java/src/main/java/io/trane/future/Promise.java:582–595

  }

  private static class BiFlatMap<T, U, R> extends Continuation<T, R> {
    private final BiFunction<? super T, ? super U, ? extends Future<R>> f;
    private final Future<U> other;

    public BiFlatMap(final Future<U> other, final BiFunction<? super T, ? super U, ? extends Future<R>> f) {
      this.other = other;
      this.f = f;
    }

    @Override
    final Future<R> apply(final Future<T> result) {
      return result.biFlatMap(other, f);
    }
  }

  @Override
  public <U, R> Future<R> biFlatMap(final Future<U> other,