function _genesis_register_default_widget_areas_cb() {

  global $wp_registered_sidebars;

  if ( isset( $wp_registered_sidebars['header-right'] ) ) {
    genesis_register_widget_area(
      [
        'id'               => 'header-right',
        'name'             => is_rtl() ? __( 'Header Left', 'genesis' ) : __( 'Header Right', 'genesis' ),
        'description'      => __( 'This is the header widget area. It typically appears next to the site title or logo. This widget area is not suitable to display every type of widget, and works best with a custom menu, a search form, or possibly a text widget.', 'genesis' ),
        '_genesis_builtin' => true,
      ]
    );
  }

  if ( isset( $wp_registered_sidebars['sidebar'] ) ) {
    genesis_register_widget_area(
      [
        'id'               => 'sidebar',
        'name'             => __( 'Primary Sidebar', 'genesis' ),
        'description'      => __( 'This is the primary sidebar if you are using a two or three column site layout option.', 'genesis' ),
        '_genesis_builtin' => true,
      ]
    );
  }

  if ( isset( $wp_registered_sidebars['sidebar-alt'] ) ) {
    genesis_register_widget_area(
      [
        'id'               => 'sidebar-alt',
        'name'             => __( 'Secondary Sidebar', 'genesis' ),
        'description'      => __( 'This is the secondary sidebar if you are using a three column site layout option.', 'genesis' ),
        '_genesis_builtin' => true,
      ]
    );
  }

}