iOSleep

public struct SomeTypeWrapper<Base> {
	public 
}

iOSleep

class Delegate<Input, Output> {
    private var block: ((Input) -> Output?)?
    func delegate<T: AnyObject>(on target: T, block: ((T, Input) -> Output)?) {
        self.block = { [weak target] input in
            guard let target = target else { return nil }
            return block?(target, input)
        }
    }
    
    func call(_ input: Input) -> Output? {