Alamofire 4 get the response on a specific queue

AlamofireOnBackgroundQueue.swift

let queue = DispatchQueue(label: "com.response-queue", qos: .utility, attributes: [.concurrent])
Alamofire.request("Some URL", parameters: ["Some": "Param"])
    .response(
        queue: queue,
        responseSerializer: DataRequest.jsonResponseSerializer(),
        completionHandler: { response in
            /* 
               You are now running on the queue you created. So you
               can parse the response to model objects or do any
               other handling if necessary.
            */
            //Then you can return to the main thread
            DispatchQueue.main.async {
            }
        }
)