compatibility_init(); } /** * Get the instance of this class. * * @return Controller|null */ public static function instance() { if ( null === self::$instance ) { $class_name = __CLASS__; self::$instance = new $class_name(); } return self::$instance; } /** * Register the compatibility hooks for the plugin. */ public function compatibility_init() { add_action( 'bb_email_customize_preview', array( $this, 'bb_hide_querymonitor_dispatchers' ) ); } /** * Removed Query monitor code from email customizer page. * * @return void */ public function bb_hide_querymonitor_dispatchers() { if ( function_exists( 'wp_doing_ajax' ) && wp_doing_ajax() ) { return; } ob_start(); ?>