CancelBag for combine framework that works like DisposeBag of RxSwift

CancelBag.swift

class CancelBag {
    private var bag: [Cancellable] = []
    private var named: [String: Cancellable] = [:]

    func cancelAll() {
        bag.forEach { $0.cancel() }
        bag = []

        named.forEach { $0.value.cancel() }
        named = [:]
    }

    func cancel(_ name: String) {
        named[name]?.cancel()
    }

    func add(_ cancellable: Cancellable, as name: String) {
        named[name] = cancellable
    }

    func add(_ cancellable: Cancellable, as name: String? = nil) {
        if let name = name {
            named[name] = cancellable
        } else {
            bag.append(cancellable)
        }
    }

    deinit {
        cancelAll()
    }
}

extension Cancellable {
    func add(to bag: CancelBag) {
        bag.add(self)
    }
}