The provider method

    AnotherProvider.provide_some() -> SomeClass

provides for

    AnotherProvider.some = Resource(ConcreteClass, ResourceKind.PRIVATE)

But the method's return type annotation 'SomeClass' is not compatible with
'ConcreteClass'
So the return type must be compatible with 'ConcreteClass'

AnotherProvider: "src/seamful/provider/test_provider.py"
