return "hi"
            }
        })

        expect:
        registry.getAll(String) == ["12", "hi"]
        registry.getAll(Number) == [12]
    }

    def removesDuplicateServicesWhenParentIsReachableViaMultiplePaths() {
        def root = new DefaultServiceRegistry()
        root.add(String, "root")
        def parent1 = new DefaultServiceRegistry(root)
        parent1.add(String, "p1")