code: @Override
      public void init(String jsonString) throws TransformerException {
          try {
              setConfig(new JsonSimpleConfig(jsonString));
          } catch (IOException e) {
              throw new TransformerException(e);
          }
      }
docs: Initializes the plugin using the specified JSON String
  
  @param jsonString JSON configuration string
  @throws TransformerException if there was an error in initialization