how to defined a function with variable argument size by macro 'rquickjs::function'

[LXS2000]

there is a function i created,jsreq is necessary， the remaining arguments is optional

#[rquickjs::function]
pub async fn fetch<'js>(
jsreg: JsRequest.
proxy: Option<String>
ja3: Option<i64>,
h2: Option<i64>
ctx: Ctx<'js>,
)-> Result<JsResponse>

when i use it in js runtime ，i got a error

Error calling function with 2 argument(s) while 4 where expected

[LXS2000]

await fetch(request, proxy)

[DelSkayn]

Using Option<T> as an argument signifies to rquickjs that the value can be null-like i.e. either the value T undefined or null but that the argument is still required. If you want the argument to be optional use Opt

[LXS2000]

Thank you for your answer ,it's work