//We have some class, HTTPManager, that allows us to perform a GET request to a URL.
//Upon successful fetch of the data, the success closure is executed with the data (represented as NSData,
//more or less the raw bytes) and the calling function can then do what it needs with the data.
//the method signature of HTTPManager.get() is   class func get(url: String, success: (data: NSData) -> Void, failure: (error: //String) -> Void) { }

HTTPManager.get("www.example.com", success: { (data) in

    //we wrap this in a do/catch block (essentially a try/except block) because .JSONObjectWithData() can throw an Error.

    do {

        //we declare it [String: AnyObject] because the types of the values in the JSON object cannot be automatically inferred.

        let json: [String: AnyObject]? = try NSJSONSerialization.JSONObjectWithData(data: data, options: NSJSONReadingOptions.MutableContainers) as? [String: AnyObject]

    <if the json is not nil, do whatever you need with it>

    } catch {


    }

    }, failure: { (error) in



})