extractionContext.child(ModelType.of(UnmanagedThing), "child")
            extractionContext.found(new ScalarValueSchema<CustomThing>(extractionContext.type))
        }
        1 * strategy.extract(_) >> { ModelSchemaExtractionContext extractionContext ->
            assert extractionContext.type == ModelType.of(UnmanagedThing)
            extractionContext.found(new ScalarValueSchema<UnmanagedThing>(extractionContext.type))
        }