Shouldn't .SubmitForm() return variables?

[DumboJetEngine]

I am completely new to Camunda and to this library, but I try to submit a form to complete a user task like that:

await camunda.UserTasks[taskInfo.Id]
	.SubmitForm(new Camunda.Api.Client.UserTask.CompleteTask { Variables = variables, WithVariablesInReturn = true });

Given the WithVariablesInReturn propertty on CompleteTask, I would expect that .SubmitForm() should return the updated variables.
The same way as ProcessDefinitionResource.StartProcessInstance() does.
But .SubmitForm() returns a Task instead.

Am I missing something?

While trying to workaround this, I have managed to get the variables myself like so:

var resultVariable = await camunda.ProcessInstances[instanceInfo.Id].Variables.Get("result", false);
var result = JsonSerializer.Deserialize<Result>(resultVariable.Value as string, new JsonSerializerOptions { PropertyNameCaseInsensitive = true });

[FreeAndNil]

This repo ist dead. Please go to https://github.com/komsa-ag/Camunda.Api.Client