[Pharo-project] SystemNavigationTest>>setUp looks quite strange to me

Hi guillermo I saw that you modified setUp super setUp. oldMonticelloAnnouncer := SystemAnnouncer privateAnnouncer. SystemAnnouncer instVarNamed: 'privateAnnouncer' put: nil. navigator := self createSystemNavigationToTest. classFactory := self createClassFactory. Now I would like to understand why? Especially because privateAnnouncer should not be used and touched. SystemAnnouncer privateAnnouncer returns an announcer that should only be used by internal (not tools). BTW the teardown looks wrong to me. Stef