code: @SuppressWarnings("resource")
      @Override
      protected HoconTreeTraversingParser _createParser(InputStream in, IOContext ctxt)
          throws IOException, JsonParseException
      {
          Reader r = _createReader(in, null, ctxt);
          return _createParser(r, ctxt);
      }
docs: protected IOContext _createContext(Object srcRef, boolean resourceManaged)