_TriggerContentRedraw
_TriggerContentRedraw(*dirty);
_TriggerContentRedraw(*dirtyContentRegion, *exposeContentRegion);
_TriggerContentRedraw(dirtyRegion, exposeRegion);
_TriggerContentRedraw(viewRegion);
void _TriggerContentRedraw(BRegion& dirty,
_TriggerContentRedraw();
void _TriggerContentRedraw();