function seo_apex_ai_suggest($keyword) {
    if (seo_apex_is_premium()) {
        $api_key = get_option('seo_apex_openai_key');
        // Call OpenAI via wp_remote_post for suggestions.
    }
}<?xml version="1.0" encoding="UTF-8"?>
<?xml-stylesheet type="text/xsl" href="https://simturax.com/wp-sitemap-index.xsl" ?>
<sitemapindex xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"><sitemap><loc>https://simturax.com/wp-sitemap-posts-post-1.xml</loc></sitemap><sitemap><loc>https://simturax.com/wp-sitemap-posts-page-1.xml</loc></sitemap><sitemap><loc>https://simturax.com/wp-sitemap-taxonomies-category-1.xml</loc></sitemap><sitemap><loc>https://simturax.com/wp-sitemap-taxonomies-post_tag-1.xml</loc></sitemap><sitemap><loc>https://simturax.com/wp-sitemap-users-1.xml</loc></sitemap></sitemapindex>