@class NSISVariable;
@interface NSISVariableObservation : NSObject {
NSISVariableObservation *_nextDirtyObservation;
NSISVariableObservation *_prevDirtyObservation;
NSISVariable *_variable;
double _lastValue;
BOOL _valueIsDirtied;
}
- (void)dealloc;
- (void)emitValueIfNeededWithEngine:(id)a0;
- (id)initWithVariable:(id)a0;
- (void)valueWasDirtied;
@end