Custom AutomateWoo Rules

functions.php

<?php

add_filter('automatewoo/rules/includes', 'my_automatewoo_rules' );

/**
 * @param array $rules
 * @return array
 */
function my_automatewoo_rules( $rules ) {
	
	$rules['my_unique_rule_id'] = dirname(__FILE__) . '/includes/rule.php'; // absolute path to rule
	return $rules;
}

rule.php

<?php
/**
 * In this example we create a rule for order billing post/zip codes.
 * This will be a simple true/false string match
 */

class My_AW_Rule_Order_Billing_Post_Code extends AutomateWoo\Rules\Rule {
	
	/** @var string - can be string|number|object|select */
	public $type = 'string';
	
	/** @var string - (required) choose which data item this rule will apply to */
	public $data_item = 'order';

	/**
	 * Init
	 */
	function init() {
		// the title for your rule
		$this->title = __( 'Order Billing Post Code', 'automatewoo' );

		// grouping in the admin list
		$this->group = __( 'Order', 'automatewoo' );

		// compare type is the middle select field in the rule list
		// you can define any options here but this is a basic true/false example
		$this->compare_types = [
			'is' => __( 'is', 'automatewoo' ),
			'is_not' => __( 'is not', 'automatewoo' )
		];
	}


	/**
	 * Validates the rule based on options set by a workflow
	 * The $data_item passed will already be validated
	 * @param $data_item
	 * @param $compare
	 * @param $expected_value
	 * @return bool
	 */
	function validate( $data_item, $compare, $expected_value ) {
		// because $this->data_item == 'order' $data_item wil be a WC_Order object
		$order = $data_item;
		$actual_value = $order->billing_postcode;

		// we set 2 compare types
		switch ( $compare ) {
			case 'is':
				return $actual_value == $expected_value;
				break;

			case 'is_not':
				return $actual_value != $expected_value;
				break;
		}

		return false;
	}

}

return new My_AW_Rule_Order_Billing_Post_Code(); // must return a new instance

i did the same but cannot see my custom rule. where is the php saved?