code: public void stopDeletingMsgsWihoutReferencesTask(boolean hasToStop) {
          if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled())
              SibTr.entry(tc, "stopDeletingMsgsWihoutReferencesTask", hasToStop);
  
          this.HasToStop = hasToStop;
  
          if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled())
              SibTr.exit(tc, "stopDeletingMsgsWihoutReferencesTask", hasToStop);
  
      }
docs: Gives signal to deleteMsgsWithNoReferences() to gracefully exit. This happens in two cases
  (i) When ME is stopped and (ii) When the destination is deleted
  
  @param hasToStop