Merge pull request #218 from Yoast/JRF/docs-add-return-void

Docs: add missing return type void annotations

src/indexing-reason-integration.php

@@ -9,6 +9,8 @@ class Indexing_Reason_Integration implements Integration {
 
 	/**
 	 * Registers the hook to set the indexing reason.
+	 *
+	 * @return void
 	 */
 	public function add_hooks() {
 		\add_filter( 'wpseo_indexables_indexation_alert', [ $this, 'set_indexing_alert' ], 10, 2 );

src/query-monitor-output.php

@@ -29,6 +29,8 @@ public function name() {
 
 	/**
 	 * Renders the Query Monitor output integration.
+	 *
+	 * @return void
 	 */
 	public function output() {
 		$this->before_non_tabular_output( 'qm-yoast-seo', $this->name() );

src/query-monitor.php

@@ -9,6 +9,8 @@ class Query_Monitor implements Integration {
 
 	/**
 	 * Registers our menu item and output function.
+	 *
+	 * @return void
 	 */
 	public function add_hooks() {
 		\add_filter( 'qm/output/panel_menus', [ $this, 'add_menu_panel' ], 80 );

src/schema.php

@@ -27,6 +27,8 @@ public function __construct( Option $option ) {
 
 	/**
 	 * Adds the required hooks for this class.
+	 *
+	 * @return void
 	 */
 	public function add_hooks() {
 		if ( $this->option->get( 'replace_schema_domain' ) === true ) {

src/xml-sitemaps.php

@@ -25,6 +25,8 @@ public function __construct( Option $option ) {
 
 	/**
 	 * Adds the required hooks for this class.
+	 *
+	 * @return void
 	 */
 	public function add_hooks() {
 		if ( $this->option->get( 'disable_xml_sitemap_cache' ) === true ) {