use Palmero\Withforks;

class Container extends Withforks {

	protected function getSomeClass() {
		return new SomeClass(
			$this->getSettings()['someClass']
		);
	}

	protected function getSomeOtherClass() {
		return new SomeOtherClass(
			$this->getSettings()['someOtherClass']
		);
	}

}

To instantiate the container, just pass it an associative array with the configs required for each method:

$container = new Container([
	'someClass' => [
		'config' => true
	],
	'someOtherClass' => [
		'config' => "something"
	],
]);

You can access everything...:

The PSR-11 way: $container->has('someClass') and $container->get('someClass')
The Withforks way: $container->someClass