Make Int convertible to DispatchTime or DispatchTimeInterval

DispatchTimeIntervalConvertible.swift

import Foundation

protocol DispatchTimeIntervalConvertible {
    func seconds() -> DispatchTimeInterval
    func milliseconds() -> DispatchTimeInterval
    
    func secondsFromNow() -> DispatchTime
    func millisecondsFromNow() -> DispatchTime
}

extension Int : DispatchTimeIntervalConvertible {}

extension DispatchTimeIntervalConvertible where Self == Int {
    func seconds() -> DispatchTimeInterval {
        return DispatchTimeInterval.seconds(self)
    }
    
    func milliseconds() -> DispatchTimeInterval {
        return DispatchTimeInterval.milliseconds(self)
    }
    
    func secondsFromNow() -> DispatchTime {
        return DispatchTime.now() + self.seconds()
    }
    
    func millisecondsFromNow() -> DispatchTime {
        return DispatchTime.now() + self.milliseconds()
    }
}