Error in value in line 33 → Value of type 'Result <Any, AFError> 'has no member' value'

import UIKit
import GoogleMaps
import Alamofire
importSwiftyJSON

classViewController:UIViewController {

    override func viewDidLoad(){
        super.viewDidLoad()
        // Do any additional setup after loading the view.

        super.viewDidLoad()
        // Do any additional setup after loading the view.
        // Create a GMSCameraPosition that tell the map to display the
        // coordinate-33.86, 151.20 at zoom level 6.
        let camera = GMSCameraPosition.camera (with Latitude:35.665751, longitude: 139.728687, zoom: 6.0)
        letmapView = GMSMapView.map (withFrame:self.view.frame, camera:camera)
        self.view.addSubview(mapView)

        // Create a marker in the center of the map.
        let marker = GMSMarker()
        marker.position = CLLocationCoordinate 2D (latitude: 35.665751, longitude: 139.728687)
        marker.title="Roppongi"
        marker.snippet="Roppongi 7-chome 4-1 in Minato-ku, Tokyo"
        marker.map=mapView

        AF.request("https://map.yahooapis.jp/search/local/V1/localSearch?cid=d8a23e9e64a4c817227ab09858bc1330&lat=35.662654694078626&lon=139.73135330250383&dist=2&query=%E3%83%A9%E3%83%BC%E3%83%A1%E3%83%B3&appid=dj00aiZpPWdzNkFwb2NZRWxBbiZzPWNvbnN1bWVyc2VjcmV0Jng9MjY-&output=json").responseJSON {response in}

            iflet jsonObject=response.result.value{
                let json=JSON(jsonObject)
                let features = json ["Feature" ]
                // If json is.Dictionary
                for (key, subJson): (String, JSON) in json {
                   // Do something you want
                    let name = subJson ["Name"].stringValue
                    let address = subJson ["Property"]["Address"].stringValue
                    let coordinates = subJson ["Geometry"] ["Coordinates"].stringValue
                    let coordinatesArray=coordinates.split(separator:",")
                    let lat = coordinatesArray[1]
                    letlon=coordinatesArray[0]
                    let latDouble=Double(lat)
                    letlonDouble=Double(lon)

                    let marker = GMSMarker()
                    marker.position = CLLocationCoordinate 2D (latitude: latDouble, longitude:lonDouble)
                    marker.title=name
                    marker.snippet="Roppongi 7-chome 4-1 in Minato-ku, Tokyo"
                    marker.map=mapView
                }
            }
        }

    }


}