code: func (s Session) SubmissionsComments(submissionID string) ([]*Comment, error) {
  	redditURL := "https://www.reddit.com"
  	redditURL += "/comments/" + submissionID
  	redditURL += ".json"
  
  	req := request{
  		url:       redditURL,
  		useragent: s.useragent,
  	}
  	body, err := req.getResponse()
  	if err != nil {
  		return nil, err
  	}
  
  	var comments interface{}
  	err = json.NewDecoder(body).Decode(&comments)
  	if err != nil {
  		return nil, err
  	}
  	helper := new(helper)
  	helper.buildComments(comments)
  
  	return helper.comments, nil
  }
docs: // SubmissionComments returns the comments on a submission given it's ID.