reference/src/main/resources/jcr_root/apps/reference/components/general/reference/config.json

 {
    "jcr:primaryType": "nt:unstructured",
    "sling:resourceType": "sling-cms/components/general/container",
    "availableComponentTypes": {
        "jcr:primaryType": "nt:unstructured",
        "sling:resourceType": "sling-cms/components/cms/availablecomponenttypes"
    }
}