@Override
 public int hashCode() {
   final int prime = 31;
   int hashRresult = 1;
   hashRresult = prime * hashRresult + ((context == null) ? 0 : context.hashCode());
   hashRresult = prime * hashRresult + ((requestor == null) ? 0 : requestor.hashCode());
   return hashRresult;
 }