code: public void addEngineCommand(String command)
    {
      if (command == null || command.length() == 0) {
        return;
      }
      
      int p = command.indexOf(':');
      
      String arg = "";
      
      if (p > 0) {
        arg = command.substring(p + 1);
        command = command.substring(0, p);
      }
      
      StringBuilder sb = new StringBuilder();
      
      sb.append(_engineCommands);
      
      sb.append("\1");
          
      sb.append(command);
      
      sb.append("\1");
      
      sb.append(arg);
      
      _engineCommands = sb.toString();
    }
docs: Sets the engine-commands