The goal here is to be able to augment the client with additional data
as we get it. At this point I'm now augmenting with the mailbox data
that the MailboxList is requesting and showing that.
That's progress.
There may be significant issues with making multiple requests in a
single round-trip because my client library appears to do things like
hard-coding the position of specific requests. I may have to work around
this.
