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#pragma clang system_header
#define nil 0
#define BOOL int
#define NS_ASSUME_NONNULL_BEGIN _Pragma("clang assume_nonnull begin")
#define NS_ASSUME_NONNULL_END _Pragma("clang assume_nonnull end")
NS_ASSUME_NONNULL_BEGIN
typedef struct _NSZone NSZone;
@protocol NSObject
+ (instancetype)alloc;
- (instancetype)init;
- (instancetype)autorelease;
@end
@protocol NSCopying
- (id)copyWithZone:(nullable NSZone *)zone;
@end
@protocol NSMutableCopying
- (id)mutableCopyWithZone:(nullable NSZone *)zone;
@end
__attribute__((objc_root_class))
@interface
NSObject<NSObject>
@end
@interface NSString : NSObject<NSCopying>
- (BOOL)isEqualToString : (NSString *)aString;
- (NSString *)stringByAppendingString:(NSString *)aString;
@end
void NSSystemFunctionTakingNonnull(NSString *s);
@interface NSSystemClass : NSObject
- (void) takesNonnull:(NSString *)s;
@end
NS_ASSUME_NONNULL_END
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