code: public GitlabBadge editGroupBadge(Integer groupId, Integer badgeId, String linkUrl, String imageUrl) throws IOException {
          String tailUrl = GitlabGroup.URL + "/" + groupId + GitlabBadge.URL
                  + "/" + badgeId;
          GitlabHTTPRequestor requestor = retrieve().method(PUT);
          requestor.with("link_url", linkUrl)
                  .with("image_url", imageUrl);
          return requestor.to(tailUrl, GitlabBadge.class);
      }
docs: Edit group badge
  
  @param groupId  The id of the group for which the badge should be edited
  @param badgeId  The id of the badge that should be edited
  @param linkUrl  The URL that the badge should link to
  @param imageUrl The URL to the badge image
  @return The updated badge
  
  @throws IOException on GitLab API call error