nemomobile/libcommhistory — pull request #44 by special (2013-08-29 00:13:34+00:00)
Title: [declarative] Add contactUpdated and contactRemoved signals to ContactAddressLookup

As far as I'm aware, there's nothing similar available from n-q-p-contacts. This is used to watch changes to the contacts active in a conversation for some corner cases not covered by group contact logic.