class DataService {
    @GET("data/items")
    private var listApiBuilder: YTKNetworkApiBuilder<ItemList>

    func listApi(startCursor: String, limit: Int = 20, arguments: [String: Any?]) -> YTKNetworkApi<ItemList> {
        return listApiBuilder.build(with: #function, startCursor, limit, arguments)
    }

    @GET("data/items/{itemId}")
    private var itemApiBuilder: YTKNetworkApiBuilder<Item>

    func itemApi(itemId: Int) -> YTKNetworkApi<Item> {
        return itemApiBuilder.build(with: #function, itemId)
    }
}

let service = DataService()
// request "data/items?startCursor=0&limit=20&key1=value1&key2=value2
let listApi = service.listApi(startCursor: "0", arguments: ["key1": 1, "key2": "value2", "key3": nil])
// request "data/items/123456
let itemApi = service.itemApi(itemId: 123456)