-ConfigTracksCommand::ConfigTracksCommand(CustomTrackView* view, QList< TrackInfo > oldInfos, QList< TrackInfo > newInfos, QUndoCommand* parent) :
+ConfigTracksCommand::ConfigTracksCommand(CustomTrackView* view, const QList<TrackInfo> &oldInfos, const QList<TrackInfo> &newInfos, QUndoCommand* parent) :