code: @Override
      public NGScope scope() {
          NGScope isolateScope = NGScope.create();
          isolateScope.put(getName(), "=");
          return isolateScope;
      }
docs: Creates isolateScope and registers the following attribute definition.
  <ul>
  <li>{@code TextResource} prettify</li>
  <li>{@code String} prettify</li>
  </ul>