setPersonaCustomers example

$customer1 = new CustomerEntity();
        $customer1->setId('C1');
        $customer1->setCustomerNumber('C1');

        $customer2 = new CustomerEntity();
        $customer2->setId('C2');
        $customer2->setCustomerNumber('C2');

        $promotion = new PromotionEntity();
        $promotion->setCustomerRestriction(true);

        $promotion->setPersonaCustomers(new CustomerCollection([$customer1, $customer2]));

        $custRule1 = new CustomerNumberRule();
        $custRule1->assign(['numbers' => ['C1'], 'operator' => Rule::OPERATOR_EQ]);

        $custRule2 = new CustomerNumberRule();
        $custRule2->assign(['numbers' => ['C2'], 'operator' => Rule::OPERATOR_EQ]);

        $expected = new AndRule(
            [
                // this is the customer rules OR condition                 new OrRule(
                    [