public static function init_config( array $config ) {

    // Initialize the script configuration.
    $script = [
      'mainMenu'            => __( 'Menu', 'genesis' ),
      'menuIconClass'       => 'dashicons-before dashicons-menu',
      'menuIconOpenedClass' => 'dashicons-before dashicons-no-alt',
      'subMenu'             => __( 'Submenu', 'genesis' ),
      'subMenuIconClass'    => 'dashicons-before dashicons-arrow-down-alt2',
      'menuClasses'         => [
        'combine' => [],
        'others'  => [],
      ],
    ];
    if ( isset( $config['script'] ) ) {
      $script = array_merge( $script, $config['script'] );
    }

    // Initialize the extras configuration.
    $extras = [
      'media_query_width' => '1023px',
      'css'               => '',
      'enable_AMP'        => true,
      'enable_non_AMP'    => true,
    ];
    if ( isset( $config['extras'] ) ) {
      $extras = array_merge( $extras, $config['extras'] );
    }

    return compact( 'script', 'extras' );

  }