internal Enumerator(DictionarySlim <TKey, TValue> dictionary)
 {
     _dictionary = dictionary;
     _index      = 0;
     _count      = _dictionary._count;
     _current    = default;
 }
 public DictionarySlimDebugView(DictionarySlim <K, V> dictionary)
 {
     _dictionary = dictionary ?? throw new ArgumentNullException(nameof(dictionary));
 }
 internal ValueCollection(DictionarySlim <TKey, TValue> dictionary)
 {
     _dictionary = dictionary;
 }