static const int extended_data_key;
(NSData *)objc_getAssociatedObject(object, &extended_data_key)
objc_setAssociatedObject(object, &extended_data_key, extendedData, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
static const int extended_data_key;
(NSData *)objc_getAssociatedObject(object, &extended_data_key)
objc_setAssociatedObject(object, &extended_data_key, extendedData, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
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