All classes that implement ArrayAccess have warnings.

[bpleon]

List of warning I am seeing:

zipMoney\Model\Metadata::offsetUnset($offset) should either be compatible with ArrayAccess::offsetUnset(mixed $offset): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice (file: /var/www/site/vendor/zipmoney/merchantapi-php/lib/Model/Metadata.php, line: 158)
zipMoney\Model\Metadata::offsetSet($offset, $value) should either be compatible with ArrayAccess::offsetSet(mixed $offset, mixed $value): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice (file: /var/www/site/vendor/zipmoney/merchantapi-php/lib/Model/Metadata.php, line: 144)
zipMoney\Model\Metadata::offsetGet($offset) should either be compatible with ArrayAccess::offsetGet(mixed $offset): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice (file: /var/www/site/vendor/zipmoney/merchantapi-php/lib/Model/Metadata.php, line: 133)
zipMoney\Model\Metadata::offsetExists($offset) should either be compatible with ArrayAccess::offsetExists(mixed $offset): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice (file: /var/www/site/vendor/zipmoney/merchantapi-php/lib/Model/Metadata.php, line: 123)
zipMoney\Model\Checkout::offsetUnset($offset) should either be compatible with ArrayAccess::offsetUnset(mixed $offset): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice (file: /var/www/site/vendor/zipmoney/merchantapi-php/lib/Model/Checkout.php, line: 530)
zipMoney\Model\Checkout::offsetSet($offset, $value) should either be compatible with ArrayAccess::offsetSet(mixed $offset, mixed $value): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice (file: /var/www/site/vendor/zipmoney/merchantapi-php/lib/Model/Checkout.php, line: 516)
zipMoney\Model\Checkout::offsetGet($offset) should either be compatible with ArrayAccess::offsetGet(mixed $offset): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice (file: /var/www/site/vendor/zipmoney/merchantapi-php/lib/Model/Checkout.php, line: 505)
zipMoney\Model\Checkout::offsetExists($offset) should either be compatible with ArrayAccess::offsetExists(mixed $offset): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice (file: /var/www/site/vendor/zipmoney/merchantapi-php/lib/Model/Checkout.php, line: 495)
zipMoney\Model\CheckoutConfiguration::offsetUnset($offset) should either be compatible with ArrayAccess::offsetUnset(mixed $offset): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice (file: /var/www/site/vendor/zipmoney/merchantapi-php/lib/Model/CheckoutConfiguration.php, line: 190)
zipMoney\Model\CheckoutConfiguration::offsetSet($offset, $value) should either be compatible with ArrayAccess::offsetSet(mixed $offset, mixed $value): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice (file: /var/www/site/vendor/zipmoney/merchantapi-php/lib/Model/CheckoutConfiguration.php, line: 176)
zipMoney\Model\CheckoutConfiguration::offsetGet($offset) should either be compatible with ArrayAccess::offsetGet(mixed $offset): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice (file: /var/www/site/vendor/zipmoney/merchantapi-php/lib/Model/CheckoutConfiguration.php, line: 165)
zipMoney\Model\CheckoutConfiguration::offsetExists($offset) should either be compatible with ArrayAccess::offsetExists(mixed $offset): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice (file: /var/www/site/vendor/zipmoney/merchantapi-php/lib/Model/CheckoutConfiguration.php, line: 155)
zipMoney\Model\OrderItem::offsetUnset($offset) should either be compatible with ArrayAccess::offsetUnset(mixed $offset): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice (file: /var/www/site/vendor/zipmoney/merchantapi-php/lib/Model/OrderItem.php, line: 492)
zipMoney\Model\OrderItem::offsetSet($offset, $value) should either be compatible with ArrayAccess::offsetSet(mixed $offset, mixed $value): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice (file: /var/www/site/vendor/zipmoney/merchantapi-php/lib/Model/OrderItem.php, line: 478)
zipMoney\Model\OrderItem::offsetGet($offset) should either be compatible with ArrayAccess::offsetGet(mixed $offset): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice (file: /var/www/site/vendor/zipmoney/merchantapi-php/lib/Model/OrderItem.php, line: 467)
zipMoney\Model\OrderItem::offsetExists($offset) should either be compatible with ArrayAccess::offsetExists(mixed $offset): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice (file: /var/www/site/vendor/zipmoney/merchantapi-php/lib/Model/OrderItem.php, line: 457)
zipMoney\Model\OrderShipping::offsetUnset($offset) should either be compatible with ArrayAccess::offsetUnset(mixed $offset): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice (file: /var/www/site/vendor/zipmoney/merchantapi-php/lib/Model/OrderShipping.php, line: 236)
zipMoney\Model\OrderShipping::offsetSet($offset, $value) should either be compatible with ArrayAccess::offsetSet(mixed $offset, mixed $value): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice (file: /var/www/site/vendor/zipmoney/merchantapi-php/lib/Model/OrderShipping.php, line: 222)
zipMoney\Model\OrderShipping::offsetGet($offset) should either be compatible with ArrayAccess::offsetGet(mixed $offset): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice (file: /var/www/site/vendor/zipmoney/merchantapi-php/lib/Model/OrderShipping.php, line: 211)
zipMoney\Model\OrderShipping::offsetExists($offset) should either be compatible with ArrayAccess::offsetExists(mixed $offset): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice (file: /var/www/site/vendor/zipmoney/merchantapi-php/lib/Model/OrderShipping.php, line: 201)
zipMoney\Model\CheckoutOrder::offsetUnset($offset) should either be compatible with ArrayAccess::offsetUnset(mixed $offset): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice (file: /var/www/site/vendor/zipmoney/merchantapi-php/lib/Model/CheckoutOrder.php, line: 366)
zipMoney\Model\CheckoutOrder::offsetSet($offset, $value) should either be compatible with ArrayAccess::offsetSet(mixed $offset, mixed $value): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice (file: /var/www/site/vendor/zipmoney/merchantapi-php/lib/Model/CheckoutOrder.php, line: 352)
zipMoney\Model\CheckoutOrder::offsetGet($offset) should either be compatible with ArrayAccess::offsetGet(mixed $offset): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice (file: /var/www/site/vendor/zipmoney/merchantapi-php/lib/Model/CheckoutOrder.php, line: 341)
zipMoney\Model\CheckoutOrder::offsetExists($offset) should either be compatible with ArrayAccess::offsetExists(mixed $offset): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice (file: /var/www/site/vendor/zipmoney/merchantapi-php/lib/Model/CheckoutOrder.php, line: 331)
zipMoney\Model\Address::offsetUnset($offset) should either be compatible with ArrayAccess::offsetUnset(mixed $offset): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice (file: /var/www/site/vendor/zipmoney/merchantapi-php/lib/Model/Address.php, line: 483)
zipMoney\Model\Address::offsetSet($offset, $value) should either be compatible with ArrayAccess::offsetSet(mixed $offset, mixed $value): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice (file: /var/www/site/vendor/zipmoney/merchantapi-php/lib/Model/Address.php, line: 469)
zipMoney\Model\Address::offsetGet($offset) should either be compatible with ArrayAccess::offsetGet(mixed $offset): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice (file: /var/www/site/vendor/zipmoney/merchantapi-php/lib/Model/Address.php, line: 458)
zipMoney\Model\Address::offsetExists($offset) should either be compatible with ArrayAccess::offsetExists(mixed $offset): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice (file: /var/www/site/vendor/zipmoney/merchantapi-php/lib/Model/Address.php, line: 448)
zipMoney\Model\Shopper::offsetUnset($offset) should either be compatible with ArrayAccess::offsetUnset(mixed $offset): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice (file: /var/www/site/vendor/zipmoney/merchantapi-php/lib/Model/Shopper.php, line: 483)
zipMoney\Model\Shopper::offsetSet($offset, $value) should either be compatible with ArrayAccess::offsetSet(mixed $offset, mixed $value): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice (file: /var/www/site/vendor/zipmoney/merchantapi-php/lib/Model/Shopper.php, line: 469)
zipMoney\Model\Shopper::offsetGet($offset) should either be compatible with ArrayAccess::offsetGet(mixed $offset): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice (file: /var/www/site/vendor/zipmoney/merchantapi-php/lib/Model/Shopper.php, line: 458)
zipMoney\Model\Shopper::offsetExists($offset) should either be compatible with ArrayAccess::offsetExists(mixed $offset): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice (file: /var/www/site/vendor/zipmoney/merchantapi-php/lib/Model/Shopper.php, line: 448)
zipMoney\Model\CreateCheckoutRequest::offsetUnset($offset) should either be compatible with ArrayAccess::offsetUnset(mixed $offset): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice (file: /var/www/site/vendor/zipmoney/merchantapi-php/lib/Model/CreateCheckoutRequest.php, line: 353)
zipMoney\Model\CreateCheckoutRequest::offsetSet($offset, $value) should either be compatible with ArrayAccess::offsetSet(mixed $offset, mixed $value): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice (file: /var/www/site/vendor/zipmoney/merchantapi-php/lib/Model/CreateCheckoutRequest.php, line: 339)
zipMoney\Model\CreateCheckoutRequest::offsetGet($offset) should either be compatible with ArrayAccess::offsetGet(mixed $offset): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice (file: /var/www/site/vendor/zipmoney/merchantapi-php/lib/Model/CreateCheckoutRequest.php, line: 328)
zipMoney\Model\CreateCheckoutRequest::offsetExists($offset) should either be compatible with ArrayAccess::offsetExists(mixed $offset): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice (file: /var/www/site/vendor/zipmoney/merchantapi-php/lib/Model/CreateCheckoutRequest.php, line: 318)