IOS Swift 3 Alamofire 4.0.0
<p>Here is my code facing error at <code>NSMutable</code> line:</p>

<pre><code>import UIKit
import Alamofire

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()

        let url = NSURL(string: "http://jsonplaceholder.typicode.com/users")
        var request = NSMutableURLRequest(URL:url!)
        request.HTTTPMethod = "GET"
        request.setValue("application/json",forHTTTPHeaderField:"Content-Type")
        Alamofire.request(request).responseJSON{
            response in
            switch resposnse.result{
            case.Success(let data):
                print("Successfully grabbed response",data)
            case.Failure(let error):
                print("request failed with error\(error)")
            }
        }
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
}
</code></pre>

<p>Please, can someone resolve my issue?</p>