/**
  * Run SendPress install if plugin is network activated
  * network-wide.
  *
  * Will only be called by multisite actions.
  * @internal Unfortunately will fail if the plugin is in the must-use directory
  * @see https://core.trac.wordpress.org/ticket/24205
  */
 static function on_activate_blog($blog_id)
 {
     if (!function_exists('is_plugin_active_for_network')) {
         require_once ABSPATH . '/wp-admin/includes/plugin.php';
     }
     if (is_plugin_active_for_network(plugin_basename(SENDPRESS_FILE))) {
         switch_to_blog($blog_id);
         SendPress::plugin_install();
         restore_current_blog();
     }
 }