System/Library/PrivateFrameworks/AppleMediaServices.framework

AMSFrozenBagValue.h

NSObject
>
AMSBagValue

@protocol AMSBagDataSourceProtocol;

@interface AMSFrozenBagValue : AMSBagValue

@property (retain, nonatomic) id<AMSBagDataSourceProtocol> dataSource;

- (id)initWithKey:(id)a0 value:(id)a1 valueType:(unsigned long long)a2;
- (void).cxx_destruct;

@end