protobuf-3 – 如何在protobuf中存储时间3

struct File {
  name string
  creatation_time time.Time
}

我如何在protobuf3中编写它？

syntax = "proto3";

import google_protobuf "github.com/golang/protobuf/ptypes/timestamp"

message File {
    string name = 1;
    google.protobuf.Timestamp creatation_time = 2;  
}

编译后,请检查example.pb.go以获取已创建的结构定义.