public static DataSourceStandard <NullableCollectionDataContainerFactory <NullableDefaultedCollectionStateValidator <TValue>, TValue, TValue>, Option <TValue[]>, TValue[], ItemCountValidator <TValue> > ItemCount <TValue>(this NullableDefaultedCollectionStateValidator <TValue> source, int?minimumItems = null, int?maximumItems = null) => source.Add(new ItemCountValidator <TValue>(minimumItems, maximumItems));
public static DataSourceStandard <NullableCollectionDataContainerFactory <NullableDefaultedCollectionStateValidator <TValue>, TValue, TValue>, Option <TValue[]>, TValue[], CustomValidator <TValue[]> > Assert <TValue>(this NullableDefaultedCollectionStateValidator <TValue> source, string description, Func <TValue[], bool> validator) => source.Add(new CustomValidator <TValue[]>(description, validator));
public static DataSourceStandard <NullableCollectionDataContainerFactory <NullableDefaultedCollectionStateValidator <TValue>, TValue, TValue>, Option <TValue[]>, TValue[], UniqueValidator <TValue> > Unique <TValue>(this NullableDefaultedCollectionStateValidator <TValue> source) => source.Add(new UniqueValidator <TValue>());
public static DataSourceInverted <NullableCollectionDataContainerFactory <NullableDefaultedCollectionStateValidator <TValue>, TValue, TValue>, Option <TValue[]>, TValue[], TValueValidator> Not <TValue, TValueValidator>(this NullableDefaultedCollectionStateValidator <TValue> source, Func <NullableDefaultedCollectionStateValidator <TValue>, DataSourceStandard <NullableCollectionDataContainerFactory <NullableDefaultedCollectionStateValidator <TValue>, TValue, TValue>, Option <TValue[]>, TValue[], TValueValidator> > validatorFactory)
where TValueValidator : struct, IValueValidator <TValue[]>
=> validatorFactory.Invoke(source).InvertOne();