What is the best way to handle calls to asynchronous code inside a JSClosure, especially if one needs to return the result of such call from the JSClosure? Consider the following example:

let closure = .object(JSClosure { (arguments: [JSValue]) in
    guard let url = arguments.first?.string else {
        return JSValue.undefined
    }
    return await fetch(url)
})

This results in the following error:

cannot pass function of type '([JSValue]) async -> JSValue' to parameter expecting synchronous function type

The reason is obvious, but is there a nice way to work around this?