@interface _TtC7SwiftUIP33_91555EE1A45CC99D949E9B39601C01F623ActivitySubjectProvider : NSObject <UIActivityItemSource> {
    void /* unknown type, empty encoding */ item;
    void /* unknown type, empty encoding */ subject;
}

- (id)init;
- (void).cxx_destruct;
- (id)activityViewController:(id)a0 itemForActivityType:(id)a1;
- (id)activityViewController:(id)a0 subjectForActivityType:(id)a1;
- (id)activityViewControllerPlaceholderItem:(id)a0;

@end