How to cancel a specific DispatchQueue.main.asyncAfter event?

Question

The question was already asked some time ago. But I'm not able to find a nice solution matching to the current Swift version.

• Cancel a timed event in Swift? (is already outdated)

• How to cancel DispatchQueue.main.asyncAfter(deadline: time) in Swift3? (got no simple & right answer)

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Swift 4 - How to cancel a specific call to DispatchQueue.main.asyncAfter?

DispatchQueue.main.asyncAfter(deadline: .now() + 0.5) {
    // my code
}

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DispatchQueue.main.asyncAfter(deadline: .now() + 2.0) {
    // just cancel this event!
}