True.  At the moment, though, I need the icon paths to be associated with presence info, and thus reported in the same order as presenceStates and presenceMessages.  If we change it, I think we will also need to report presenceAccountPaths (being account paths of the accounts in the order reported by presenceStates), which would allow the caller to match up with the canonical accountPaths, and thus to accountIconPaths.

Or maybe, we need to fix presence reporting to be in the same order as the accounts are reported?