docs: public void validate(String destName, String busName) throws SINotPossibleInCurrentConfigurationException 
    {
      if (tc.isEntryEnabled())
        SibTr.entry(tc, "validate", new Object[] { destName, busName }); 
            
      if (collector.contains(destName, busName))
      {
        // Throw out exception detailing loop    
        // Add the destination name which has triggered the exception to the end
        // of the list, making the problem obvious.
        String chainText = toStringPlus(destName, busName);
        
        CompoundName firstInChain = getFirstInChain();
        
        String nlsMessage = nls.getFormattedMessage(
          "ALIAS_CIRCULAR_DEPENDENCY_ERROR_CWSIP0621",
          new Object[] { firstInChain, chainText, busName },
          null); 
        
        SINotPossibleInCurrentConfigurationException e 
          = new SINotPossibleInCurrentConfigurationException(nlsMessage);
                
        SibTr.exception(tc, e);
          
        if (tc.isEntryEnabled())
          SibTr.exit(tc, "validate", nlsMessage);
  
        throw e;
      }
  
      collector.add(destName, busName);
      
      if (tc.isEntryEnabled())
        SibTr.exit(tc, "validate");     
    }