@Nullable
  private static AbstractVcs getContextVcs(@Nullable Project project, @NotNull DataContext dataContext) {
    if (project == null) return null;

    ProjectLevelVcsManager vcsManager = ProjectLevelVcsManager.getInstance(project);
    AbstractVcs[] activeVcss = vcsManager.getAllActiveVcss();
    if (activeVcss.length == 0) return null;
    if (activeVcss.length == 1) return activeVcss[0];

    VirtualFile file = CommonDataKeys.VIRTUAL_FILE.getData(dataContext);
    if (file == null) return null;
    return ProjectLevelVcsManager.getInstance(project).getVcsFor(file);
  }
@Nullable
  private static AbstractVcs getContextVcs(@Nullable Project project, @NotNull DataContext dataContext)