code: public static JsonNode toJsonNode(String jsonString) throws IOException {
          return (JacksonJsonSingletonHelper.JACKSON_JSON.objectMapper.readTree(jsonString));
      }
docs: Parse the provided String into a JsonNode instance.
  
  @param jsonString a String containing JSON to parse
  @return a JsonNode with the String parsed into a JSON tree
  @throws IOException if any IO error occurs