int registerCellTriggerEventForUnitToUnit(int sourceUnitId, int destUnitId);
int registerCellTriggerEventForUnitToLocation(int sourceUnitId, const Vec2i &pos);
int registerCellTriggerEventForFactionToUnit(int sourceFactionId, int destUnitId);
int registerCellTriggerEventForFactionToLocation(int sourceFactionId, const Vec2i &pos);
int getCellTriggerEventCount(int eventId);
void unregisterCellTriggerEvent(int eventId);
int startTimerEvent();
int stopTimerEvent(int eventId);
int timerEventSecondsElapsed(int eventId);
int triggeredCellEventId();
int triggeredTimerEventId();
LUA events:
timerTriggerEvent
cellTriggerEvent