public static ValueReadOnlyCollectionExtensions.SkipTakeEnumerable <ValueWrapper <TKey, TValue>, Dictionary <TKey, TValue> .Enumerator, KeyValuePair <TKey, TValue> > Take <TKey, TValue>(this Dictionary <TKey, TValue> source, int count)
     where TKey : notnull
 => ValueReadOnlyCollectionExtensions.Take <ValueWrapper <TKey, TValue>, Dictionary <TKey, TValue> .Enumerator, KeyValuePair <TKey, TValue> >(new ValueWrapper <TKey, TValue>(source), count);
 public static ValueReadOnlyCollectionExtensions.SkipTakeEnumerable <ValueWrapper <TSource>, Queue <TSource> .Enumerator, TSource> Take <TSource>(this Queue <TSource> source, int count)
 => ValueReadOnlyCollectionExtensions.Take <ValueWrapper <TSource>, Queue <TSource> .Enumerator, TSource>(new ValueWrapper <TSource>(source), count);
 public static ValueReadOnlyCollectionExtensions.SkipTakeEnumerable <ValueWrapper <TKey, TValue>, SortedDictionary <TKey, TValue> .KeyCollection.Enumerator, TKey> Take <TKey, TValue>(this SortedDictionary <TKey, TValue> .KeyCollection source, int count)
 => ValueReadOnlyCollectionExtensions.Take <ValueWrapper <TKey, TValue>, SortedDictionary <TKey, TValue> .KeyCollection.Enumerator, TKey>(new ValueWrapper <TKey, TValue>(source), count);