public CachePool(string name, T original, int maxSize, float cacheTime = -1)
{
_name = name;
_original = original;
_maxSize = maxSize;
_lastUseTime = cacheTime < 0 ? 0 : Time.time;
_cacheTime = cacheTime;
_cache = new SimplePool <T>(original.name, maxSize, AutoCreate);
_usingObjects = new HashSet <T>();
Capacity += _maxSize;
}