public boolean contains(Object cacheKey) {
   return _cache.contains(cacheKey);
 }
 public synchronized void clear() {
   _cache.clear();
 }
 public synchronized Object remove(Object cacheKey) {
   return _cache.remove(cacheKey);
 }
 public long getCachedSize() {
   return _cache.getCachedSize();
 }
 public Object getCachedData(Object cacheKey) {
   return _cache.getCachedData(cacheKey);
 }
 public synchronized void cache(Object cacheKey, Object obj) {
   _cache.cache(cacheKey, obj);
 }