public static Task<CallParkResponseData> ParkAsync(this AudioVideoCall call,
     CallParkOptions options)
 {
     return Task<CallParkResponseData>.Factory.FromAsync(
         call.BeginPark, call.EndPark,
         options, null);
 }
 public static Task <CallParkResponseData> ParkAsync(this AudioVideoCall call,
                                                     CallParkOptions options)
 {
     return(Task <CallParkResponseData> .Factory.FromAsync(
                call.BeginPark, call.EndPark,
                options, null));
 }