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1@interface Foo2@end3 4@interface Foo(Top)5-(void)top;6@end7 8@interface Foo(Top2)9-(void)top2;10@end11 12@interface Foo(Top3)13-(void)top3;14@end15 16@protocol P117@end18 19@protocol P220@end21 22@protocol P3, P4;23 24 1@interface Foo2@end3 4@interface Foo(Top)5-(void)top;6@end7 8@interface Foo(Top2)9-(void)top2;10@end11 12@interface Foo(Top3)13-(void)top3;14@end15 16@protocol P117@end18 19@protocol P220@end21 22@protocol P3, P4;23 24