public void CancelDiscover()
 {
     _discoveryCancelable?.Cancel((NSError e) =>
     {
         // Do Nothing
     });
     _discoveryCancelable = null;
     _discoveredReaders.Clear();
 }
 public void CancelPayment()
 {
     if (_cancelable != null)
     {
         _cancelable.Cancel((NSError) =>
         {
         });
     }
 }