docs: public boolean isKnownNonSelectorExpression(
      String topicExpression,
      boolean isWildcarded)
    {
      if (tc.isEntryEnabled()) 
        SibTr.entry(tc, 
                    "isKnownNonSelectorExpression", 
                    new Object[]{topicExpression,
                                 new Boolean(isWildcarded)});
  
      boolean isCategorised = false;
      
      // No Selector expression
      if(isWildcarded)
      {
        // No selector and wildcarded
        isCategorised = _wildcardNonSelectorSubs.containsKey(topicExpression);
      }
      else
      {
        // No selector and not wildcarded
        isCategorised = _exactNonSelectorSubs.containsKey(topicExpression);
      }      
     
      if (tc.isEntryEnabled()) SibTr.exit(tc, "isKnownNonSelectorExpression", new Boolean(isCategorised));
      return isCategorised;
    }