public void updateCache(S session, V var, R value) {
   if (status != CompletionStatus.NORMAL) {
     invalidReads.remove(var);
   }
   delegate.updateCache(session, var, value);
 }
 public void updateCache(S session, V var) {
   if (status != CompletionStatus.NORMAL) {
     invalidReads.add(var);
   }
   delegate.updateCache(session, var);
 }