public function get_page_id() {
		$checkout_page = (int) tribe_get_option( Settings::$option_checkout_page );

		if ( empty( $checkout_page ) ) {
			return null;
		}

		/**
		 * Allows filtering of the Page ID for the Checkout page.
		 *
		 * @since 5.1.9
		 *
		 * @param int|null $checkout_page Which page is used in the settings.
		 */
		return apply_filters( 'tec_tickets_commerce_checkout_page_id', $checkout_page );
	}