@interface RealityKit.__RKEntityAction : _TtCs12_SwiftObject <NSCopying> {
    void /* unknown type, empty encoding */ targetEntity;
    void /* unknown type, empty encoding */ targetEntityEngine;
    void /* unknown type, empty encoding */ finishedHandler;
    void /* unknown type, empty encoding */ groupHandler;
    void /* unknown type, empty encoding */ stateObservers;
    void /* unknown type, empty encoding */ completionHandler;
    void /* unknown type, empty encoding */ isAlternate;
    void /* unknown type, empty encoding */ isExclusive;
    void /* unknown type, empty encoding */ exclusiveBlocksForCompletion;
    void /* unknown type, empty encoding */ state;
    void /* unknown type, empty encoding */ multiplePerformBehaviour;
}

- (id)copyWithZone:(void *)a0;

@end