System/Library/PrivateFrameworks/MetricKitSource.framework
MXSourceData.h
@interface MXSourceData : NSObject <NSSecureCoding>
@property (class, readonly) BOOL supportsSecureCoding;
- (id)init;
- (void)encodeWithCoder:(id)a0;
- (id)initWithCoder:(id)a0;
@end