Symfony override autowired services

I'm writing a Symfony 4 bundle and inside, in a compiler pass, I create multiple service definitions based on an abstract one (also enabling autowiring based on the argument name):

    $managerDefinition = new ChildDefinition(Manager::class);
    $managerDefinition->replaceArgument(0, $managerName);
    ...
    $container->registerAliasForArgument($managerId, Manager::class, $managerName . 'Manager');

And this is the abstract service definition:

services:
    MyBundle\Manager:
        abstract: true
        arguments:
            - # manager name

So, in my App controller I can have this and it works correctly:

public function __construct(MyBundle\Manager $barManager)
{
    // $barManager is MyBundle\Manager
}

Now, let's say at some point I decide to extend the Manager class in my App with additional methods:

class MyManager extends \MyBundle\Manager
{
    public function newMethod() {
        ...
    }
}

I override the bundle's abstract service like this:

services:
    MyBundle\Manager:
        class: App\Manager
        abstract: true
        arguments:
            - # manager name

Everything still works as expected:

public function __construct(MyBundle\Manager $barManager)
{
    // $barManager is App\Manager

    $barManager->newMethod(); // Works
}

However, the IDE complains that newMethod() does not exist, as it doesn't exist in the typehinted MyBundle\Manager.

So, it seems more correct to change my constructor definition to let it know the actual class it's going to receive:

public function __construct(App\Manager $barManager)

However, I can't write this, as auto-wiring no longer works.

I suppose I could write a compiler pass in my App that registers autowiring for my custom App\Manager, but that seems like an overkill.

I can't shake the feeling that I'm doing something fundamentally wrong.

I guess my question is, what would be the best way to allow easy overriding of the abstract Manager definition in the bundle?