public ArrayDictionary <TKey, TValue> ArrayDictionary <TKey, TValue>()
 => ArrayDictionaryConcurrentPool <TKey, TValue> .Get();
 public void Return <TKey, TValue>(params ArrayDictionary <TKey, TValue>[] items)
 => ArrayDictionaryConcurrentPool <TKey, TValue> .Return(items);
 public void Return <TKey, TValue>(IEnumerable <ArrayDictionary <TKey, TValue> > items)
 => ArrayDictionaryConcurrentPool <TKey, TValue> .Return(items);
 public void Return <TKey, TValue>(ArrayDictionary <TKey, TValue> item)
 => ArrayDictionaryConcurrentPool <TKey, TValue> .Return(item);