@class NSString; @protocol NSObject; @interface UITraitPreferredContentSizeCategory : NSObject <UITraitDefinitionPrivate, UIObjectTraitDefinition> @property (class, readonly, nonatomic) BOOL defaultValueRepresentsUnspecified; @property (class, readonly, nonatomic) BOOL _isPrivate; @property (class, readonly, nonatomic) NSString *identifier; @property (class, readonly, nonatomic) NSString *name; @property (class, readonly, nonatomic) BOOL affectsColorAppearance; @property (class, readonly, nonatomic) id<NSObject> defaultValue; @end