code: @Override
      public Executor<R> build() {
          Executor<R> executor = new SynchronousExecutorImpl<R>(this.retryPolicy, this.circuitBreakerPolicy, this.timeoutPolicy, this.bulkheadPolicy, this.fallbackPolicy, this.scheduledExecutorService, this.metricRecorder);
  
          return executor;
      }
docs: {@inheritDoc}