docs: public static Map<String, String> parameterMapToStringStringMap(
              Map<String, IPortletDefinitionParameter> parametersMap) {
  
          if (null == parametersMap) {
              return null;
          }
  
          Map<String, String> stringMap = new HashMap<>(parametersMap.size());
  
          for (String key : parametersMap.keySet()) {
              stringMap.put(key, parametersMap.get(key).getValue());
          }
  
          return stringMap;
      }