api_spec.kt

class Endpoint {
    constructor(path: String) {
    }

    fun query(key: String, defaultValue: String = "", valueExample: String = "", description: String = "") {
    }
}

fun post(path: String, func: Endpoint.()->Unit): Endpoint {
    return Endpoint(path)
}

data class Task(var title: String)

fun main(args: Array<String>) {
    post("/task") {
        query("Lng", valueExample = "56")
    }
}