Type: Array and nullable: true does not render nullable

I have a response which either returns an array or null. I specify the return json schema with:

{
  "$schema": "http://json-schema.org/draft-07/schema#",
    "type": "array",
    "uniqueItems": true,
    "items": {
      ....
    }
  "nullable": true
}

But redoc does not render this like for other types e.g. integers.

I currently use the following workaround:

{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "oneOf": [
    {
      "type": "array",
      "uniqueItems": true,
      "items": {
        "$ref": "../shared/id.json#"
      }
    },
    {
      "type": "any"
      "nullable":true
    }
  ]
}