code: func MustTimestampProto(t time.Time) *gogotypes.Timestamp {
  	ts, err := gogotypes.TimestampProto(t)
  	if err != nil {
  		panic(err.Error())
  	}
  	return ts
  }
docs: // MustTimestampProto converts time.Time to a google.protobuf.Timestamp proto.
  // It panics if input timestamp is invalid.