field, bts, err = msgp.ReadMapKeyZC(bts)
		if err != nil {
			err = msgp.WrapError(err)
			return
		}
		switch msgp.UnsafeString(field) {
		case "cacheInterval":
			z.cacheInterval, bts, err = msgp.ReadDurationBytes(bts)
			if err != nil {
				err = msgp.WrapError(err, "cacheInterval")
				return
			}
		case "metricsGroupOpts":
			bts, err = z.metricsGroupOpts.UnmarshalMsg(bts)
			if err != nil {