public void Return <T>(IEnumerable <Stack <T> > items)
 => StackConcurrentPool <T> .Return(items);
 public void Return <T>(Stack <T> item)
 => StackConcurrentPool <T> .Return(item);
 public void Return <T>(params Stack <T>[] items)
 => StackConcurrentPool <T> .Return(items);
 public Stack <T> Stack <T>()
 => StackConcurrentPool <T> .Get();