Dependency container docs: "Your container MUST implement these required services."

[fulldecent]

In the dependency container documentation it says:

Your container MUST implement these required services. If you use Slim’s built-in container, these are provided for you. If you choose a third-party container, you must define these required services on your own.

...

But I have been using my own custom \Psr\Container\ContainerInterface implementation wired in with:

AppFactory::setContainer($container);
$app = AppFactory::create();

where it does NOT comply with any of the documented requirements and for years I have had no problems.

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Perhaps we can remove that documented requirement, or we can explain how PHP Slim uses each of those "requirements".