code: public String toStringPlus(String destName, String busName)
    {
      StringBuffer sb = new StringBuffer(toString());
      
      // Add the destination name which has triggered the exception to the end
      // of the list, making the problem obvious.
      String compoundName = new CompoundName(destName, busName).toString();
      sb.append(" -> ");
      sb.append(compoundName);
      
      return sb.toString();
    }
docs: Return a string representation of the alias chain appended with the
  destination name given.
  
  @param destName
  @param busName
  @return