I see now that it is the same signature as init. Here is an example. let deferredMenuElement = UIDeferredMenuElement.uncached { completion in let action = UIAction(title: "Title", handler: { _ in }) completion([action]) }

Would anyone be able to briefly describe how to use this? It is undocumented and there are only four or five web search results for elementWithUncachedProvider, none useful.