public function __construct() {
		parent::__construct();
		add_action( 'admin_notices', array( $this, 'bulk_admin_notices' ) );
		add_action( 'admin_footer', array( $this, 'order_preview_template' ) );
		add_filter( 'get_search_query', array( $this, 'search_label' ) );
		add_filter( 'query_vars', array( $this, 'add_custom_query_var' ) );
		add_action( 'parse_query', array( $this, 'search_custom_fields' ) );
	}