System/Library/PrivateFrameworks/SiriSpeechSynthesis.framework

QSSMutableUserDataEntity.h

NSObject
>
QSSUserDataEntity

@class NSArray;

@interface QSSMutableUserDataEntity : QSSUserDataEntity

@property (copy, nonatomic) NSArray *attributes;

- (id)init;
- (id)copyWithZone:(struct _NSZone { } *)a0;

@end