experimental_useObject ability to reset object

[T04435]

Feature Description

sdk version "ai": "3.2.34"
Similar to

const { setCompletion } = useCompletion(...)

which can be used to unset the completion.
I actually think a better approach would be to reset the object to undefined when submit starts, but if that is not possible then a

const { setObject } = useObject(...)

const handleSubmit () => {
  // unset object
  setObject(undefined);
  submit('stream object');
}  

Use Case

avoid showing the last object while generating the new one.
ATM have to copy object to another useState to reset, same for onFinish but that's another topic.

Additional context

No response