retrieveThreadChannelByIdOrNull
Retrieves a thread belonging to this guild, by ID.
The cached threads are checked first, and then a request is made.
The returned thread may be null if:
It doesn't exist
The bot doesn't have access to it
The channel isn't a thread
The channel isn't from the correct guild
See also
Retrieves a thread from any guild, by ID.
The cached threads are checked first, and then a request is made.
The returned thread may be null if:
It doesn't exist
The bot doesn't have access to it
The channel isn't a thread
The thread isn't owned by a guild of this shard