I have a Safari app extension that needs to know the url of the current active tab. When I press a button, a function in SafariExtensionViewController gets called with the following code: let safari = SFSafariPageProperties() let currentURL = safari.url But currentURL is nil. Not sure what I'm doing wrong? The extension is for mac. Safari 14, macOS 11.1

I've been going through the documentation. I can't seem to find the docs that cover all the new AI features.