Stub out new properties/enum in URLSessionConfiguration

Author: Pushkar Kulkarni

Foundation/URLSession/URLSessionConfiguration.swift

@@ -209,4 +209,19 @@ open class URLSessionConfiguration : NSObject, NSCopying {
      */
      open var protocolClasses: [AnyClass]?
 
+     /* A Boolean value that indicates whether the session should wait for connectivity to become available, or fail immediately */
+     open var waitsForConnectivity: Bool = false
+
+     /* A service type that specifies the Multipath TCP connection policy for transmitting data over Wi-Fi and cellular interfaces*/
+     open var multipathServiceType: URLSessionConfiguration.MultipathServiceType = .none
+
+}
+
+extension URLSessionConfiguration {
+    public enum MultipathServiceType {
+        case none
+        case handover
+        case interactive
+        case aggregate
+    }
 }