@Nullable
  private static String configureRemote(
      @NotNull Project project,
      @NotNull GitRepository gitRepository,
      @NotNull GithubFullPath forkPath) {
    String url = GithubUrlUtil.getCloneUrl(forkPath);

    if (GithubUtil.addGithubRemote(project, gitRepository, forkPath.getUser(), url)) {
      return forkPath.getUser();
    } else {
      return null;
    }
  }
  @Nullable
  private static GithubFullPath findRepositoryByUser(
      @NotNull Project project,
      @NotNull String user,
      @NotNull Set<GithubFullPath> forks,
      @NotNull GithubAuthData auth,
      @NotNull GithubRepo source) {
    for (GithubFullPath path : forks) {
      if (StringUtil.equalsIgnoreCase(user, path.getUser())) {
        return path;
      }
    }

    try {
      GithubRepoDetailed target = GithubApiUtil.getDetailedRepoInfo(auth, user, source.getName());
      if (target.getSource() != null
          && StringUtil.equals(target.getSource().getUserName(), source.getUserName())) {
        return target.getFullPath();
      }
    } catch (IOException ignore) {
      // such repo may not exist
    }

    try {
      GithubRepo fork =
          GithubApiUtil.findForkByUser(auth, source.getUserName(), source.getName(), user);
      if (fork != null) {
        return fork.getFullPath();
      }
    } catch (IOException e) {
      GithubNotifications.showError(project, CANNOT_CREATE_PULL_REQUEST, e);
    }

    return null;
  }
 @Nullable
 private static GithubPullRequest createPullRequest(
     @NotNull Project project,
     @NotNull GithubAuthData auth,
     @NotNull GithubFullPath targetRepo,
     @NotNull String title,
     @NotNull String description,
     @NotNull String head,
     @NotNull String base) {
   try {
     return GithubApiUtil.createPullRequest(
         auth, targetRepo.getUser(), targetRepo.getRepository(), title, description, head, base);
   } catch (IOException e) {
     GithubNotifications.showError(project, CANNOT_CREATE_PULL_REQUEST, e);
     return null;
   }
 }