@Override
    public boolean equals(final Object o) {
      if (this == o) return true;
      if (!(o instanceof CacheKey)) return false;

      final CacheKey cacheKey = (CacheKey)o;

      if (!key.equals(cacheKey.key)) return false;
      if (!owner.equals(cacheKey.owner)) return false;

      return true;
    }
@Override
    public boolean equals(final Object o)