`google.protobuf.Struct`는 gRPC를 통해 동적 JSON을 보내기 위한 최적의 선택인가요?

syntax = "proto3";
package messages;
import "google/protobuf/struct.proto";

service UserService {
    rpc SendJson (SendJsonRequest) returns (SendJsonResponse) {}
}

message SendJsonRequest {
    string UserID = 1;
    google.protobuf.Struct Details = 2;
}

message SendJsonResponse {
    string Response = 1;
}

var item = &structpb.Struct{
    Fields: map[string]*structpb.Value{
        "name": &structpb.Value{
            Kind: &structpb.Value_StringValue{
                StringValue: "Anuj",
            },
        },
        "age": &structpb.Value{
            Kind: &structpb.Value_StringValue{
                StringValue: "Anuj",
            },
        },
    },
}

m := map[string]interface{}{
  "foo":"bar",
  "baz":123,
}
b, err := json.Marshal(m)
s := &structpb.Struct{}
err = protojson.Unmarshal(b, s)

m := map[string]interface{}{
    "name": "Anuj",
    "age":  23,
}

details, err := structpb.NewStruct(m) // Check for errors as per documentation
if err != nil {
    panic(err)
}

userGetRequest := &pb.SendJsonRequest{
    UserID: "A123",
    Details: details,
}