docs: synchronized CachedObject release(int i) {
  
          CachedObject r = (CachedObject) super.addOrRemove(i, null, true);
  
          if (r == null) {
              return null;
          }
  
          cacheBytesLength -= r.getStorageSize();
  
          r.setInMemory(false);
  
          return r;
      }