WP_Widget_Pages::update( array $new_instance, array $old_instance ): array

131	public function update( $new_instance, $old_instance ) {132		$instance          = $old_instance;133		$instance['title'] = sanitize_text_field( $new_instance['title'] );134		if ( in_array( $new_instance['sortby'], array( 'post_title', 'menu_order', 'ID' ), true ) ) {135			$instance['sortby'] = $new_instance['sortby'];136		} else {137			$instance['sortby'] = 'menu_order';138		}139 140		$instance['exclude'] = sanitize_text_field( $new_instance['exclude'] );141 142		return $instance;143	}