Hello,

In the DI service entry, I can request a collection of services that meet the same interface.

For example:

/**  * @param OrderPaymentGatewayInterface[] $providers  */ public function __construct(array $providers) { ... }

If I am using PhpStan level 9 and want to specify the exact key type in an array, DIC cannot inject services:

/**  * @param array<int, OrderPaymentGatewayInterface> $providers  */ public function __construct(array $providers) { ... }

The challenge is to add native support for composite array notation with exact key definition. In the first phase, I propose to support only the int key type and mark all others as unsupported.

Why support this notation? Much more strict type within the service.

Thanks.