synchronized void addExtensionPoint(ExtensionPoint currentExtPoint, boolean hold) {
synchronized boolean addExtensionPoint(ExtensionPoint currentExtPoint, boolean hold) { String uniqueId = currentExtPoint.getUniqueIdentifier(); if (extensionPoints.get(uniqueId) != HashtableOfStringAndInt.MISSING_ELEMENT) return false;
	synchronized void addExtensionPoint(ExtensionPoint currentExtPoint, boolean hold) {		add(currentExtPoint, hold);		extensionPoints.put(currentExtPoint.getUniqueIdentifier(), currentExtPoint.getObjectId());	}