private static void serializeCallbackResult(JsonWriter writer, CallbackResult result)
{
if (result == null)
{
writer.Write(null);
}
else
{
writer.WriteObjectStart();
writer.WritePropertyName("type");
if (result is FlowCallbackResult)
writer.Write("flow");
else if (result is MessageCallbackResult)
writer.Write("message");
else if (result is FormCallbackResult)
writer.Write("form");
writer.WritePropertyName("value");
result.Write(writer, false);
writer.WriteObjectEnd();
}
}