code: public void setFontNames(final SummernoteFontName... fontNames) {
          JsArrayString array = JavaScriptObject.createArray().cast();
          for (SummernoteFontName fontName : fontNames) {
              array.push(fontName.getName());
          }
          options.setFontNames(array);
      }
docs: Set customized font names.
  
  @param fontNames customized font names
  @see SummernoteFontName