How to use the @nestjs/microservices.GrpcStreamCall function in @nestjs/microservices

itemTypes: [1],
        shipmentType: {
          from: 'test',
          to: 'test1',
          carrier: 'test-carrier',
        },
      });
    });
    return o;
  }

  /**
   * GRPC stub implementation for syncCall stream method (implemented through call)
   * @param stream
   */
  @GrpcStreamCall('orders.OrderService')
  async syncCall(stream: any) {
    stream.on('data', (msg: any) => {
      stream.write({
        id: 1,
        itemTypes: [1],
        shipmentType: {
          from: 'test',
          to: 'test1',
          carrier: 'test-carrier',
        },
      });
    });
  }
}