@class NSISEngine, NSISVariable;
@interface _NSISVariableObservable : NSObservationSource {
_NSISVariableObservable *_nextDirtyObservable;
_NSISVariableObservable *_prevDirtyObservable;
double _lastValue;
NSISVariable *_variable;
NSISEngine *_associatedEngine;
unsigned char _hasLastValue : 1;
unsigned char _valueIsDirtied : 1;
}
+ (id)observableForVariable:(id)a0 inEngine:(id)a1;
- (void)receiveObservedValue:(id)a0;
- (void)dealloc;
- (BOOL)valueHasChanged;
- (void)emitValueIfNeeded;
@end