             if let (callback, _) = self.callRequests.removeValue(forKey: requestId) {
                 callback(message.details, message.results, message.kwResults)
             } else {
-                // TODO: log this erroneous situation
+                print("No callback found for request ID \(requestId)")
             }
         // MARK: Subscribe role
         case let message as SubscribedSwampMessage:

    fileprivate var serializer: SwampSerializer?
    fileprivate var sessionId: Int?
    fileprivate var routerSupportedRoles: [SwampRole]?

    // MARK: Call role
    //                         requestId

    internal let subscription: Int
    internal let eventCallback: EventCallback
    fileprivate var isActive: Bool = true
    
    internal init(session: SwampSession, subscription: Int, onEvent: @escaping EventCallback) {
        self.session = session
        self.subscription = subscription
