Woocommerce Bookings Abandoned cart time to 15 minutes

/**
 * Abandoned cart time to 15 minutes
 * plugins/woocommerce-bookings/includes/admin/class-wc-bookings-tools.php:64
 * By alhoseany@yahoo.com
 */
function custom_inactive_cart_time( $time ) {
    $time = 15; // minutes
    return $time;
}
add_filter( 'woocommerce_bookings_remove_inactive_cart_time', 'custom_inactive_cart_time' );