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- #import <Foundation/Foundation.h>
- NS_ASSUME_NONNULL_BEGIN
- @interface GMUtils : NSObject
- + (nullable NSString *)stringToHex:(NSString *)str;
- + (nullable NSString *)dataToHex:(NSData *)data;
- + (nullable NSString *)hexToString:(NSString *)hexStr;
- + (nullable NSData *)hexToData:(NSString *)hexStr;
- @end
- NS_ASSUME_NONNULL_END
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