Method process

test/anyflow/test_processor.cpp:691–693

      return one->setup(vertex()) + two->setup(vertex());
    }
    virtual int process() noexcept override {
      return one->process(vertex()) + two->process(vertex());
    }
    ::std::unique_ptr<GraphProcessor> one {new One};
    ::std::unique_ptr<GraphProcessor> two {new Two};
  };