GKMatch
@property(nonatomic, readonly, nullable) GKMatchProperties *properties;
GKMatch
@property(nonatomic, readonly, nullable) NSDictionary<GKPlayer *,GKMatchProperties *> *playerProperties;
GKMatchRequest
@property(atomic, copy, readwrite, nullable) NSString *queueName;
GKMatchRequest
@property(atomic, copy, readwrite, nullable) GKMatchProperties *properties;
GKMatchRequest
@property(atomic, copy, readwrite, nullable) NSDictionary<GKPlayer *,GKMatchProperties *> *recipientProperties;