Notice: post_permalink is deprecated

Notice: post_permalink is deprecated since version 4.4! Use get_permalink() instead. in /home/apcstage/public_html/wp-includes/functions.php on line 3573

seems to line 111 in \w3-total-cache\lib\W3\SharedPageUrls.php

here is working version of the function

/**
     * Returns all urls related to a post
     * @param $post_id
     * @return array
     */
    function get_post_urls($post_id) {
        if (!isset($this->post_urls[$post_id])) {
            $full_urls = array();
            $post_link = get_permalink($post_id);
            $post_uri = str_replace($this->domain_url, '', $post_link);

            $full_urls[] = $post_link;
            $uris[] = $post_uri;
            $post = get_post($post_id);
            $matches =array();
            if ($post && ($post_pages_number = preg_match_all('/\<\!\-\-nextpage\-\-\>/', $post->post_content,$matches))>0) {
                global $wp_rewrite;
                $post_pages_number++;
                for ($pagenum = 2; $pagenum <= $post_pages_number; $pagenum++) {
                    if ( 'page' == get_option('show_on_front') && get_option('page_on_front') == $post->ID )
                        $post_pagenum_link = trailingslashit($post_link) . user_trailingslashit("$wp_rewrite->pagination_base/" . $pagenum, 'single_paged');
                    else
                        $post_pagenum_link = trailingslashit($post_link) . user_trailingslashit($pagenum, 'single_paged');
                    $full_urls[] = $post_pagenum_link;
                }
            }
            $this->post_urls[$post_id] = $full_urls;
        }
        return $this->post_urls[$post_id];
    }

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