It is useful to return some grouped data
```python
@DataClass
class User:
    id: str
    name: str
```

Example for `Dict[str, list[User]]`

```json
{
  "type": "object",
  "patternProperties": {
    "^[a-z0-9!\"#$%&'()*+,.\/:;<=>?@\[\] ^_`{|}~-]+$": {
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "id": { "type": "string" },
          "name": { "type": "string" }
        },
        "required": ["id", "name"]
      }
    }
  }
}

```