Vibe.d download function, how to get callback when done or error?

[Joe at bloow.edu]

On Saturday, 23 September 2023 at 15:09:13 UTC, Elias wrote:
> On Saturday, 23 September 2023 at 12:07:38 UTC, Joe wrote:
>> I'm using download(url, filename) to download files in vibe.d.
>>
>> The issue is that I do not know when the download is finished 
>> or errors. There is a callback for the streaming side but not 
>> for the file download.
>
> You don’t need a callback for that. It’s done when the 
> download() returns.

Pretty sure it is not synchronous. I'm running it many times. 
Maybe it is synchronous and I just didn't notice.