I have a class MyUIClass that is @MainActor isolated:

@MainActor
class MyUIClass {
    func show(object: Any?) {}
}

To use the show function, it needs to be accessed within the MainActor context:

class Santa {
    @MainActor
    func present1(gift: Any?) {
        MyUIClass().show(object: gift) // ✅
    }
    
    func present2(gift: Any?) {
        Task { @MainActor in
            MyUIClass().show(object: gift) //