message: use es6 import
diff: @@ -4,18 +4,17 @@ import airbnb from './modules/colorSchemes/airbnb';
  import categoricalSchemes from './modules/colorSchemes/categorical';
  import lyft from './modules/colorSchemes/lyft';
  import { getInstance } from './modules/ColorSchemeManager';
  +import { toggleCheckbox } from './modules/utils';
  // Everything imported in this file ends up in the common entry file
  // be mindful of double-imports
  -const utils = require('./modules/utils');
  -
  $(document).ready(function () {
  $(':checkbox[data-checkbox-api-prefix]').change(function () {
  const $this = $(this);
  const prefix = $this.data('checkbox-api-prefix');
  const id = $this.attr('id');
  - utils.toggleCheckbox(prefix, '#' + id);
  + toggleCheckbox(prefix, '#' + id);
  });
  // for language picker dropdown
  