src/main/resources/SLING-INF/apps/sightly/scripts/useinheritance.json

{
    "jcr:primaryType": "sling:Folder",
    "grandparent": {
        "jcr:primaryType": "sling:Folder"
    },
    "parent": {
        "jcr:primaryType": "sling:Folder",
        "sling:resourceSuperType": "/apps/sightly/scripts/useinheritance/grandparent"
    },
    "child": {
        "jcr:primaryType": "sling:Folder",
        "sling:resourceSuperType": "/apps/sightly/scripts/useinheritance/parent"
    }
}