System/Library/PrivateFrameworks/CalendarDatabase.framework
CADObjectChangeID.h
@interface CADObjectChangeID : NSObject <NSSecureCoding>
@property (class, readonly) BOOL supportsSecureCoding;
@property (readonly, nonatomic) int entityType;
@property (readonly, nonatomic) long long changeID;
- (void)encodeWithCoder:(id)a0;
- (id)initWithCoder:(id)a0;
- (id)initWithEntityType:(int)a0 changeID:(long long)a1;
@end