Combine helper that runs a Future after a delay on a background queue

CombineHelper.swift

import Foundation
import Combine

func runDelayedInBackground<Output, DelayingScheduler: Scheduler, ReceivingScheduler: Scheduler>(
    delay: Int = 200,
    scheduler: DelayingScheduler,
    receiveOn: ReceivingScheduler,
    worker: @escaping () -> Result<Output, Never>,
    completion: @escaping (Output) -> ()
) -> AnyCancellable {
    Just(())
        .delay(for: .milliseconds(delay), scheduler: scheduler)
        .flatMap { _ in Future { $0(worker()) } }
        .receive(on: receiveOn)
        //.handleEvents(receiveCancel: { print("Cancel event received") })
        .sink(receiveValue: completion)
}

func runDelayedInBackground<Output>(
    delay: Int = 200,
    worker: @escaping () -> Result<Output, Never>,
    completion: @escaping (Output) -> ()
) -> AnyCancellable {
    runDelayedInBackground(
        delay: delay,
        scheduler: DispatchQueue.global(qos: .userInitiated),
        receiveOn: DispatchQueue.main,
        worker: worker,
        completion: completion
    )
}