code: public String getTopicSpaceBusName()
      {
          if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled())
          {
              SibTr.entry(this, tc, "getTopicSpaceBusName");
              SibTr.exit(this, tc, "getTopicSpaceBusName", topicSpaceBusName);
          }
          return topicSpaceBusName;
      }
docs: Gets the busname of the topicspace that the subscription was made through
  
  @return