container/activities/src/main/java/org/mobicents/slee/runtime/activity/ActivityContextImpl.java
public boolean attachTimer(TimerID timerID) {
		if (cacheData.attachTimer(timerID)) {
			if (acReferencesHandler != null) {
				acReferencesHandler.timerReferenceCreated();
			}
			return true;
		} else {
			return false;
		}
	}
public boolean attachTimer(TimerID timerID) {
		if (cacheData.attachTimer(timerID)) {
			if (acReferencesHandler != null) {
				acReferencesHandler.timerReferenceCreated();
			}
			return true;
		} else {
			return false;
		}
	}
attach the given timer to the current activity context.

@param timerID
-- timer id to attach.