code: @Override
      public boolean isDurable()
      {
          if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled())
              SibTr.entry(tc, "isDurable");
  
          final boolean dur = (_isPubSub && dispatcherState.isDurable());
  
          if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled())
              SibTr.exit(tc, "isDurable", Boolean.valueOf(dur));
  
          return dur;
      }
docs: Returns whether this consumerDispatcher is being used for a durable subscription.
  
  @return false if not pubsub or not durable.