public static RaiseEventExpectation WithOldCount(this NotifyCollectionChangedAction action, int count)
 {
     return(action.AsEvent().WithOldCount(count));
 }
 public static RaiseEventExpectation WithOld(this NotifyCollectionChangedAction action, params object[] items)
 {
     return(action.AsEvent().WithOld(items));
 }
 public static RaiseEventExpectation At(this NotifyCollectionChangedAction action, int index)
 {
     return(action.AsEvent().At(index));
 }