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-Random TODOs as I think of them:
-
- - Whilst the `Expansions` bit on `plugins` is a lovely surprise, I find myself
-   having to run the regexp twice because the callback does not give me any
-   captured groups (just the matched string). I run it once so the callback
-   fires, then run it again to actually extract the useful bits. This could
-   be done better.
-
- - I'm not sure about the `Plugin(roomId string)` interface function. Python
-   NEB could be configured to allow certain actions in certain rooms (e.g. only
-   expand issues in this room, not that room). You can for sure do that using
-   the given interface function, but you'd need to store those mappings
-   yourself. Python NEB did it by giving you a key-value store which you could
-   chuck config info for a room into: I wonder how useful that would be for
-   Go-NEB?
-
- - The service ID as it stands feels mingy. There are times I want to execute
-   Service code without knowing a service ID (e.g. processing webhooks, executing
-   auth code, etc) so I have to use "" just to create a Service :( Also, it feels
-   wrong to defer responsibility for knowing what a valid service ID is to the
-   caller of the /configureService API. How the hell do they know which IDs have
-   been taken?!