Method finalize

src/log/catchup.cpp:208–215

  }

  void finalize() override
  {
    catching.discard();

    // TODO(benh): Discard our promise only after 'catching' has
    // completed (ready, failed, or discarded).
    promise.discard();
  }

private:
  static void timedout(Future<uint64_t> catching)