code: public static Map<String, String> transformMap(final Map<String, Object> paramMap) {
          final Map<String, String> paramStrMap = new LinkedHashMap<String, String>();
          for (final Map.Entry<String, Object> entry : paramMap.entrySet()) {
              paramStrMap.put(entry.getKey(), entry.getValue().toString());
          }
  
          return paramStrMap;
      }
docs: Transform map.
  
  @param paramMap
  the param map
  @return the map