Actually, to resolve a value we can use ParameterBag::resolveValue() which is accessible in the Container.
This works fine but the problem is when we want to resolve a value at runtime and we have a custom ContainerInterface instance.

So I would like to have a trait or a class which would allow to resolve values without an access to a ParameterBag instance.

You can find an example of use case in FOSRestBundle where we need to resolve values at runtime.
We actually use a trait but I'd prefer to use something from the core.