public static ObservableNullableLongAverage Create(INotifyEnumerable <long?> source)
{
var observable = new ObservableNullableLongAverage(source);
observable.Successors.SetDummy();
return(observable);
}
public static INotifyValue <double?> CreateNullableLongExpression <TSource>(this IEnumerableExpression <TSource> source, Expression <Func <TSource, long?> > predicate)
{
return(ObservableNullableLongAverage.Create(source.AsNotifiable().Select(predicate)));
}