Is GrainCancellationToken default behivor to be called explicility?

[dvirsegal]

I've read a lot about GrainCancellationToken and the proposed methods to improve it - see the debate on GitHub

I couldn't understand one thing; probably someone here can help clear things. I would expect a GrainCancellationToken to be similar to a CancellationToken approach for HTTP controllers, meaning if ttl is reached, implicitly cancel the request or cancel the operation.

I created a simple hello world program that tested it, registering the CancellationToken to the cancel method of GrainCancellationTokenSource, but it wasn't implicitly triggered. I had to explicitly call ThrowIfCancellationRequested

What do you think? Am I missing something?