@Override protected void doGetRestorableState(RestorableSupport rs, RestorableSupport.StateObject context) { super.doGetRestorableState(rs, context); rs.addStateValueAsDouble(context, "leftAzimuthDegrees", this.leftAzimuth.degrees); rs.addStateValueAsDouble(context, "rightAzimuthDegrees", this.rightAzimuth.degrees); }