@class NSError, NSArray, NSMutableArray; @interface _NSKeyedUnarchiverHelper : NSObject { NSArray *_allowed; unsigned int _lastRef; NSMutableArray *_allowedClasses; BOOL expectsUnnestedCollection; BOOL decodedCollection; } @property (copy) NSError *decodeError; - (id)init; - (void)dealloc; - (void)setAllowedClassNames:(id)a0; - (id)allowedClassNames; - (BOOL)classNameAllowed:(Class)a0; @end