docs: @SuppressWarnings("unchecked")
    final static Map<String,Object> getDefaultJNDIProperties(Class<? extends JmsDestinationImpl> clazz) {
      Map<String,Object> answer = defaultJNDIProperties.get(clazz);
  
      // Ensure we get the empty map if there are no default properties
      if (answer == null) answer = Collections.EMPTY_MAP;
  
      return answer;
    }