@class AVTCoreEnvironment; @protocol AVTStickerBackend, AVTPBackendImageHandlingDelegate; @interface AVTStickerChangeObserver : NSObject @property (readonly, nonatomic) AVTCoreEnvironment *environment; @property (readonly, nonatomic) id<AVTStickerBackend> stickerBackend; @property (weak, nonatomic) id<AVTPBackendImageHandlingDelegate> imageHandlingDelegate; - (void).cxx_destruct; - (id)initWithStickerBackend:(id)a0 environment:(id)a1; - (void)processChangesForChangeTracker:(id)a0 completionHandler:(id /* block */)a1; @end