Issue #2958710 by Prashant.c: Replace usages of the deprecated drupal_set_message() function

simple_sitemap.install

@@ -148,7 +148,7 @@ function simple_sitemap_schema() {
  */
 function simple_sitemap_install() {
   $base_url = $GLOBALS['base_url'];
-  drupal_set_message(t("You can now include content into the sitemap by visiting the corresponding entity type edit pages (e.g. <a href='@content_type_url'>node type edit pages</a>).<br/>Support for additional entity types and custom links can be added on <a href='@config_url'>the module's configuration pages</a>.", ['@content_type_url' => "$base_url/admin/structure/types", '@config_url' => "$base_url/admin/config/search/simplesitemap"]));
+  \Drupal::messenger()->addMessage(t("You can now include content into the sitemap by visiting the corresponding entity type edit pages (e.g. <a href='@content_type_url'>node type edit pages</a>).<br/>Support for additional entity types and custom links can be added on <a href='@config_url'>the module's configuration pages</a>.", ['@content_type_url' => "$base_url/admin/structure/types", '@config_url' => "$base_url/admin/config/search/simplesitemap"]));
 }
 
 /**

simple_sitemap.module

@@ -244,7 +244,7 @@ function simple_sitemap_delete_bundle_config($entity_type_id, $bundle) {
     if ($generator->getSetting('cron_generate')) {
       $message .= ' Otherwise the sitemaps will be regenerated during a future cron run.';
     }
-    drupal_set_message(t($message, ['@url' => $GLOBALS['base_url'] . '/admin/config/search/simplesitemap']));
+    \Drupal::messenger()->addMessage(t($message, ['@url' => $GLOBALS['base_url'] . '/admin/config/search/simplesitemap']));
   }
 }
 

simple_sitemap.services.yml

@@ -42,6 +42,7 @@ services:
     public: true
     arguments:
       - '@logger.channel.simple_sitemap'
+      - '@messenger'
       - '@current_user'
 
   logger.channel.simple_sitemap: