def setup() {
        registry.register(
            ModelRegistrations.of(collectionPath, nodeInitializerRegistry.getNodeInitializer(forType(collectionType)))
                .descriptor("define collection")
                .build()
        )
    }

    void mutate(@DelegatesTo(ModelSet) Closure<?> action) {

        collectionType = collectionProperty.type as ModelType<C>
        def collectionSchema = schemaStore.getSchema(collectionType)
        assert collectionSchema instanceof ManagedImplSchema
        def nodeInitializer = nodeInitializerRegistry.getNodeInitializer(forType(collectionSchema.getType()))
        reference = ModelReference.of(collectionPath, collectionType)
        registry.register(
            ModelRegistrations.of(collectionPath, nodeInitializer)

            return serviceRegistry.get(StructBindingsStore.class);
        }

        @Hidden
        @Model
        NodeInitializerRegistry nodeInitializerRegistry(ModelSchemaStore schemaStore, StructBindingsStore structBindingsStore) {
            return new DefaultNodeInitializerRegistry(schemaStore, structBindingsStore);
        }

        @Hidden

Class <org.gradle.model.internal.core.NodeInitializerRegistry> is not annotated (directly or via its package) with @org.gradle.api.NonNullApi in (NodeInitializerRegistry.java:0)
Class <org.gradle.model.internal.core.NodePredicate$1> is not annotated (directly or via its package) with @org.gradle.api.NonNullApi in (NodePredicate.java:0)