[site-reviews] Purge Hummingbird page cache after a review is submitted

/**
 * Clear the Hummingbird cache for the page after a review has been created.
 * Paste this in your active theme's functions.php file.
 * @param \GeminiLabs\SiteReviews\Review $review
 * @param \GeminiLabs\SiteReviews\Commands\CreateReview $command
 * @return void
 */
add_action('site-reviews/review/created', function ($review, $command) {
    if (!empty($command->post_id)) {
        do_action('wphb_clear_page_cache', $command->post_id);
    } else {
        do_action('wphb_clear_page_cache');
    }
}, 10, 2);