@interface JetEngine.ImpressionsCalculator : _TtCs12_SwiftObject {
    void /* unknown type, empty encoding */ parent;
    void /* unknown type, empty encoding */ itemsByElementID;
    void /* unknown type, empty encoding */ configuration;
    void /* unknown type, empty encoding */ tracker;
    void /* unknown type, empty encoding */ parentItemID;
    void /* unknown type, empty encoding */ dateProvider;
    void /* unknown type, empty encoding */ context;
    void /* unknown type, empty encoding */ isVisible;
    void /* unknown type, empty encoding */ viewBounds;
}

@end