//
//  ObservationToken.swift
//  nightguard
//
//  Created by Florian Preknya on 1/30/19.
//  Copyright © 2019 private. All rights reserved.
//

import Foundation

/// The token received by an observe when subscribes to its subject. The observer can cancel observation, so the subject will remove it from its observers list.
class ObservationToken {
    
    private let cancellationClosure: () -> Void
    
    init(cancellationClosure: @escaping () -> Void) {
        self.cancellationClosure = cancellationClosure
    }
    
    func cancel() {
        cancellationClosure()
    }
}