(function (api) {
  if (api != null) {
    // Extends our custom "upgrade-to-pro" section.
    api.sectionConstructor["button"] = api.Section.extend({
      // No events for this type of section.
      attachEvents: function () {},

      // Always make the section active.
      isContextuallyActive: function () {
        return true;
      },
    });
  } else {
  }
})(wp.customize);