async fn permission_channel(
channel: &GuildChannel,
ctx: &Context,
) -> Result<GuildChannel, PreviewError>Expand description
Resolves the channel that carries the properties a thread inherits — its permission overwrites and its NSFW flag.
Threads hold neither of their own, so for any thread the parent channel is
fetched and returned. Non-thread channels are returned unchanged. A thread
without a parent_id is treated as an error.