gRPC 如何在服务中扩展 proto

Question

我不知道如何解决这个问题。 我想在服务中扩展.proto

excel_write.proto 文件

syntax = "proto3";

import "google/api/annotations.proto";

package proto.write.excel_write;

option java_multiple_files = true;
    service ExcelWriteService {
      rpc createMallExcel(CreateMallExcelRequest) returns (CreateExcelResponse) {
        option (google.api.http) = {
          post: "/excel/mall",
          body: "*"
        };
      };
    }
    
    message CreateMallExcelRequest {
      string mall = 1;
      string excel_name = 2;
      string file = 3;
      string start_line = 4;
      string status = 5;
    }

---

我的服务……

public class ExcelWriteService extends (.proto service) {

}

如何在服务中扩展.proto？ 请帮帮我