 
     - returns: The created upload request.
 */
+@discardableResult
 public func upload(
     _ method: Method,
     _ URLString: URLStringConvertible,


    - returns: The created upload request.
*/
public func upload(
    _ method: Method,
    _ URLString: URLStringConvertible,


    - returns: The created upload request.
*/
@discardableResult
public func upload(_ URLRequest: URLRequestConvertible, data: Data) -> Request {
    return Manager.sharedInstance.upload(URLRequest, data: data)
}
