- B2Client : B2::B2Client, B2::B2Titlebar
- B2Titlebar : B2::B2Titlebar, B2::B2Client
- Bridge : KWinInternal::Bridge, KWinInternal::Client
- CheckIgnoreFocusStealingProcedure : KWinInternal::Client
- FetchNameInternalPredicate : KWinInternal::Client
- GeometryUpdatesPostponer : KWinInternal::GeometryUpdatesPostponer, KWinInternal::Client
- KDecorationOptions : KDecorationOptions, KDecoration
- operator<< : KWinInternal::Rules
- ResetupRulesProcedure : KWinInternal::Client
- StackingUpdatesBlocker : KWinInternal::StackingUpdatesBlocker, KWinInternal::Workspace