public byte[] GenerateResponseBody(ResponseData responseData)
        {
            var responseEnvelope = new ResponseEnvelope(responseData.ResponseEnvelope);

            responseEnvelope.Returns.Clear();
            foreach (var response in responseData.Responses)
            {
                responseEnvelope.Returns.Add(response.Value.ToByteString());
            }

            return(responseEnvelope.ToByteArray());
        }