WooCommerce Zapier send Order data immediately (rather than asynchronously), but send Customer data asynchronously

wczapier.php

<?php
/*
The following code will tell the WooCommerce Zapier extension (v1.7.x - v1.9.x). to send Order data to
Zapier immediately, rather than sending the data asynchronously via WordPress cron.

Customer data is still sent asynchronously via WordPress cron.

Save this file as wczaper.php and place it in your wp-content/mu-plugins/ directory.

This snippet does not apply for WooCommerce Zapier version 2.0+, which uses WooCommerce core's webhook devliery mechanism instead.
*/
function wc_zapier_send_asynchronously_check( $async, $trigger ) {

	if ( is_a( $trigger, 'WC_Zapier_Trigger_Order' ) ) {
		// Order data, so send immediately
		return false;
	} else if ( is_a( $trigger, 'WC_Zapier_Trigger_New_Customer' ) ) {
		// New Customer, so send asynchronously
		return true;
	} else {
		// Other, so leave unchanged
		return $async;
	}
}
add_filter( 'wc_zapier_send_asynchronously', 'wc_zapier_send_asynchronously_check', 10, 2 );