pub fn door(
harness: &str,
verb: SessionVerb,
) -> Result<SessionDoor, SessionControlError>Expand description
Which door this (harness, verb) pair goes through, or WHY the harness
refuses it.
This is the single table the whole tier is derived from: the service, the registry block, and the refusal messages all read it, so a door can never be advertised in one place and missing in another.