Added the following:
```lang=javascript
if (request.mediaMessageContents) {
const retval = await fetchMediaFromMediaMessageContent(
viewer,
request.mediaMessageContents,
);
}
```
to `message-responders: multimediaMessageCreationResponder(...)` so `fetchMediaFromMediaMessageContent(...)` would be hit every time I sent a media message from the `native` app.
I set breakpoints throughout `fetchMediaFromMediaMessageContent(...)` and sent media messages with:
- 1 photo
- >1 photos
- 1 video
- >1 videos
- 1 photo + 1 video
- 2 photos + 2 videos
and observed that values at each step were as expected (taking special care to ensure that IDs were strings and numbers where they were supposed to be).