docs: public NotificationChain basicSetUnitCost(Parameter newUnitCost, NotificationChain msgs) {
  		Parameter oldUnitCost = unitCost;
  		unitCost = newUnitCost;
  		if (eNotificationRequired()) {
  			ENotificationImpl notification = new ENotificationImpl(this, Notification.SET, BpsimPackage.COST_PARAMETERS__UNIT_COST, oldUnitCost, newUnitCost);
  			if (msgs == null) msgs = notification; else msgs.add(notification);
  		}
  		return msgs;
  	}