@interface GCObservation : NSObject @property (weak, nonatomic) id observer; @property (nonatomic) unsigned long long options; @property (nonatomic) void *context; - (unsigned long long)hash; - (id)description; - (void).cxx_destruct; - (BOOL)isEqual:(id)a0; - (id)initWithObserver:(id)a0 options:(unsigned long long)a1 context:(void *)a2; @end