module main

type DataFn = fn (name string) string

fn which_lang(name string) string {
    return name
}

fn find_func(name string) ?DataFn {
    return match name {
        'vlang' { which_lang }
        else { none }
    }
}

fn main() {
    req := find_func('vlang')
    fun := req('options')
    println(fun)
}