docs: public boolean isKnownSelectorExpression(
      String topicExpression,
      boolean isWildcarded)
    {
      if (tc.isEntryEnabled()) 
        SibTr.entry(tc, 
                    "isKnownSelectorExpression", 
                    new Object[]{topicExpression,
                                 new Boolean(isWildcarded)});
  
      boolean isCategorised = false;
  
      if(isWildcarded)
      {
        // Test selector and wildcarded
        isCategorised = _wildcardSelectorSubs.containsKey(topicExpression);
      }
      else
      {
        // Selector but not wildcarded
        isCategorised = _exactSelectorSubs.containsKey(topicExpression);
      }
      
      if (tc.isEntryEnabled()) SibTr.exit(tc, "isKnownSelectorExpression", new Boolean(isCategorised));
      return isCategorised;
    }