if (this.cache.containsKey(o, p, subj)) { return (PrivilegeCacheElement) this.cache.get(o, p, subj);
if (this.getCache().containsKey(o, p, subj)) { return (PrivilegeCacheElement) this.getCache().get(o, p, subj);
  public PrivilegeCacheElement get(Owner o, Subject subj, Privilege p) {    if (this.cache.containsKey(o, p, subj)) {      return (PrivilegeCacheElement) this.cache.get(o, p, subj);    }    return new NullPrivilegeCacheElement(o, subj, p);  } // public PrivilegeCacheElement get(o, subj, p)