provider(for:)

Asks the responder for an element provider to fulfill the given focus-based deferred element. Check the identifier of the deferred element to identify which deferred element this is. By default, this returns nil. Return a non-nil provider to make this responder responsible for providing elements for this fulfillment of the deferred element.

func provider(for deferredElement: UIDeferredMenuElement) -> UIDeferredMenuElement.Provider?