[WooCommerce Bookings] Modify when In Cart bookings expire

wc-bookings-modify-in-cart-bookings-expiry.php

/**
 * Will change the minutes it takes an In Cart booking to expire.
 * This example reduces the number from 60 to 30.
 * 
 * @param  int $minutes 60 is the default passed
 * @return int          The amount of minutes you'd like to have In Cart bookings expire on. 
 */
function change_incart_bookings_expiry_minutes_20170825( $minutes ) {
	return 30;
}
add_filter( 'woocommerce_bookings_remove_inactive_cart_time', 'change_incart_bookings_expiry_minutes_20170825' );