(Sorry for my English) I was flying a Cessna Citation II on FlightGear FS. There are some ice on the windshield when it climbes to about 15000 ft.Is there any anti-ice system (or de-ice system) on Cessna Citation II.(I did not mean Citation X or Citation Bravo)How can I control these things? I looked for them everywhere in the cockpit, and I can't find them.