remotes/draft2020-12/name-defs.json

{
    "$schema": "https://json-schema.org/draft/2020-12/schema",
    "$defs": {
        "orNull": {
            "anyOf": [
                {
                    "type": "null"
                },
                {
                    "$ref": "#"
                }
            ]
        }
    },
    "type": "string"
}