return err
	}
	parsedDest, err := parseDestination(dest.Bucket)
	if err != nil {
		return err
	}
	if dest.StorageClass != "" {
		switch dest.StorageClass {
		case "STANDARD", "REDUCED_REDUNDANCY":
		default:
			return fmt.Errorf("unknown storage class %s", dest.StorageClass)
		}
	}
	parsedDest.StorageClass = dest.StorageClass
	*d = parsedDest
	return nil
}

	buf, err := p.readFull(int(sz))
	if err != nil {
		return "", fmt.Errorf("failed to read trace: %w", err)
	}
	return string(buf), nil
}

// parseEvent transforms raw events into events.
// It does analyze and verify per-event-type arguments.
func (p *parser) parseEvent(raw *rawEvent, ev *Event) error {
	desc := &EventDescriptions[raw.typ]
	if desc.Name == "" {
		return fmt.Errorf("missing description for event type %d", raw.typ)