code: func parseRawListing(
  	blob json.RawMessage,
  ) ([]*Comment, []*Post, []*Message, error) {
  	var activityListing thing
  	if err := json.Unmarshal(blob, &activityListing); err != nil {
  		return nil, nil, nil, err
  	}
  
  	return parseListing(&activityListing)
  }
docs: // parseRawListing parses a listing json blob and returns the elements in it.