Phase 5: Content and SEO - Yoast SEO, Schema.org markup, Open Graph, favicon support, XML sitemap

wp-content/plugins/wordpress-seo/admin/formatter/interface-metabox-formatter.php

@@ -0,0 +1,19 @@
+<?php
+/**
+ * WPSEO plugin file.
+ *
+ * @package WPSEO\Admin\Formatter
+ */
+
+/**
+ * Interface to force get_values.
+ */
+interface WPSEO_Metabox_Formatter_Interface {
+
+	/**
+	 * Returns formatter values.
+	 *
+	 * @return array
+	 */
+	public function get_values();
+}