How to obtain a protocol interface about uefi-rs HOT 2 OPEN

I had to ponder this a bit :) It is possible to do with the current API, and I've put up a PR to demonstrate this in the test-runner: #931

It's not exactly the most intuitive thing though, so I'm open to suggestions on improving this. I expect uninstalling a protocol interface to be relatively uncommon though, so maybe it's OK for it to be a little clunky -- I'm unsure.

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Hi Nicholas, thank you for your response and the example! :)

I think the way you demonstrated this is the way, it should be done when using the crate. I've implemented a handle_protocol wrapper in the meantime and didn't find a way to really integrate it in a useful way into this crate. It would introduces a lot of unsafety in my option when handling protocols, as the handler isn't automatically registered by the UEFI as it would be the case when using open_protocol. So it might be better if there only exists one way of obtaining a interface pointer. I too think, that uninstalling a protocol interface should be a uncommon task and in the seldom cases where it's useful, it's OK to be a bit clunky. But this is just my thoughts about this.

So again, thank you for your answer! :)

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