switch msgp.UnsafeString(field) {
		case "OlderThan":
			z.OlderThan, err = dc.ReadDuration()
			if err != nil {
				err = msgp.WrapError(err, "OlderThan")
				return
			}
		case "CreatedBefore":
			if dc.IsNil() {
				err = dc.ReadNil()
				if err != nil {
					err = msgp.WrapError(err, "CreatedBefore")
					return
				}
				z.CreatedBefore = nil
			} else {
				if z.CreatedBefore == nil {