public func mapObject<T: Decodable>(type: T.Type) -> Observable<T> {
        return flatMap { data -> Observable<T> in
            let (_, json) = (data as? (HTTPURLResponse, Any))!
            guard let jsonData = try? JSONSerialization.data(withJSONObject: json) else {
                throw NSError(
                    domain: "",
                    code: -1,
                    userInfo: [NSLocalizedDescriptionKey: "Please validate JSON for \(String(describing: T.self)) struct"]
                )
            }
            guard let object = try? JSONDecoder().decode(T.self, from: jsonData) else {
                throw NSError(
                    domain: "",
                    code: -1,
                    userInfo: [NSLocalizedDescriptionKey: "Failed to decode Codable struct \(String(describing: T.self))"]
                )
            }
            return Observable.just(object)
        }
    }

    public func mapArray<T: Decodable>(type: T.Type) -> Observable<[T]> {
        return flatMap { data -> Observable<[T]> in
            let (_, json) = (data as? (HTTPURLResponse, Any))!
            guard let jsonData = try? JSONSerialization.data(withJSONObject: json) else {
                throw NSError(
                    domain: "",
                    code: -1,
                    userInfo: [NSLocalizedDescriptionKey: "Please validate JSON for \(String(describing: T.self)) struct"]
                )
            }
            guard let objects = try? JSONDecoder().decode([T].self, from: jsonData) else {
                throw NSError(
                    domain: "",
                    code: -1,
                    userInfo: [NSLocalizedDescriptionKey: "Failed to decode Codable struct \(String(describing: T.self))"]
                )
            }
            return Observable.just(objects)
        }
    }