container/activities/src/main/java/org/mobicents/slee/runtime/activity/ActivityContextImpl.java
public boolean detachTimer(TimerID timerID) {
		boolean detached = cacheData.detachTimer(timerID);
		if (detached && acReferencesHandler != null) {
			acReferencesHandler.timerReferenceRemoved();
		}
		return detached;
	}
public boolean detachTimer(TimerID timerID) {
		boolean detached = cacheData.detachTimer(timerID);
		if (detached && acReferencesHandler != null) {
			acReferencesHandler.timerReferenceRemoved();
		}
		return detached;
	}
Detach timer

@param timerID