RxAlamofire cannot be used with URLRequest

I am using RxAlamofire

to create observable

. I have built URLRequest

. usually with Alamofire

we can use like Alamofire.request(urlRequest)

, but it seems like with RxAlamofire

I cannot useRxAlamofire.requet(urlRequest)

Here is my function

func createOrUpdateItem(for id: NSNumber) -> Observable<Item> {

        let testRequest = Router.top.urlRequest

        let test = RxAlamofire.request(testRequest)

    }

      

        
        
        
      

    

Here is the error

It looks like it RxAlamofire

only accepts the parameter URL

and URLConvertible

. It is strange that I browse RxAlamofire, there are 2 methods that take both URLConvertible

, and so URLRequestConvertible

. Anyone have the same problem and how to solve it? I am asking this because my application is using Alamofire Router

, which is an enumeration accepted in URLRequestConvertible

Many Thanks. Hope I can make my question clear.

/**
         Creates an observable of the `Request`.

         - parameter method: Alamofire method object
         - parameter url: An object adopting `URLConvertible`
         - parameter parameters: A dictionary containing all necessary options
         - parameter encoding: The kind of encoding used to process parameters
         - parameter header: A dictionary containing all the addional headers

         - returns: An observable of the `Request`
         */
    public func request(_ method: Alamofire.HTTPMethod, _ url: URLConvertible, parameters: [String : Any]? = default, encoding: ParameterEncoding = default, headers: [String : String]? = default) -> RxSwift.Observable<Alamofire.DataRequest>

    /**
         Creates an observable of the `Request`.

         - parameter URLRequest: An object adopting `URLRequestConvertible`
         - parameter parameters: A dictionary containing all necessary options
         - parameter encoding: The kind of encoding used to process parameters
         - parameter header: A dictionary containing all the addional headers

         - returns: An observable of the `Request`
         */
    public func request(urlRequest: URLRequestConvertible) -> RxSwift.Observable<Alamofire.DataRequest>