Dropdown Options special request

There is a special param request in dropdown option which is city.

An example to use this param is:

http://apiv4.ordering.co/v400/en/demo/dropdownoptions?params=city_id,city

🚧
The params city is requires city_id to works.

[
    {
        "id": 1,
        "city_id": 1,
        "city": {
            "id": 1,
            "name": "New York",
            "country_id": 1,
            "administrator_id": 4,
            "enabled": true
        }
    },
    ...
]