NSSecureUnarchiveFromDataTransformer.allowedTopLevelClasses不再包括NSSet吗？

如何解决NSSecureUnarchiveFromDataTransformer.allowedTopLevelClasses不再包括NSSet吗？

在NSSecureUnarchiveFromDataTransformer的类标题中，记录了NSSet是允许的类。

/// A value transformer which transforms values to and from \c NSData by archiving and unarchiving using secure coding.
API_AVAILABLE(macos(10.14),ios(12.0),watchos(5.0),tvos(12.0))
@interface NSSecureUnarchiveFromDataTransformer : NSValueTransformer

/// The list of allowable classes which the top-level object in the archive must conform to on encoding and decoding.
///
/// Returns the result of \c +transformedValueClass if not \c Nil; otherwise,currently returns \c NSArray,\c NSDictionary,\c NSSet,\c Nsstring,\c NSNumber,\c NSDate,\c NSData,\c NSURL,\c NSUUID,and \c NSNull.
///
/// Can be overridden by subclasses to provide an expanded or different set of allowed transformation classes.
@property (class,readonly,copy) NSArray<Class> *allowedTopLevelClasses;

@end

但是，调用此方法时，我看到NSSet不包含在返回的数组中。

(lldb) po NSSecureUnarchiveFromDataTransformer.allowedTopLevelClasses
<__NSArrayI 0x600003a59fe0>(
NSArray,NSDictionary,Nsstring,NSNumber,NSDate,NSData,NSURL,NSUUID,NSNull
)

我正在使用NSSet的CoreData属性，使用时会崩溃。

这是错误，还是有所更改？