code: function getLoaderDoc(message) {
      let tpl = defaults.templates.loader;
      let str = (tpl && tpl({message: message})) || '<document></document>';
  
      return Parser.dom(str);
  }
docs: Get a loader document.
  
  @inner
  @alias module:navigation.getLoaderDoc
  
  @param  {String} message         Loading message
  @return {Document}               A newly created loader document