Merged in feature/from-pantheon (pull request #16)

code from pantheon

* code from pantheon

wp/wp-content/plugins/wordpress-seo/src/helpers/notification-helper.php

@@ -0,0 +1,25 @@
+<?php
+
+namespace Yoast\WP\SEO\Helpers;
+
+use Yoast_Notification;
+use Yoast_Notification_Center;
+
+/**
+ * A helper object for notifications.
+ */
+class Notification_Helper {
+
+	/**
+	 * Restores a notification (wrapper function).
+	 *
+	 * @codeCoverageIgnore
+	 *
+	 * @param Yoast_Notification $notification The notification to restore.
+	 *
+	 * @return bool True if restored, false otherwise.
+	 */
+	public function restore_notification( Yoast_Notification $notification ) {
+		return Yoast_Notification_Center::restore_notification( $notification );
+	}
+}