@Override
  public void update(@NotNull AnActionEvent e) {
    final DataContext dc = e.getDataContext();
    final ChangeList[] lists = VcsDataKeys.CHANGE_LISTS.getData(dc);
    final boolean enabled = lists != null && lists.length == 1 && lists[0] instanceof SvnChangeList;
    boolean visible;
    Project project = CommonDataKeys.PROJECT.getData(dc);
    if (project == null) {
      visible = VcsDataKeys.REMOTE_HISTORY_LOCATION.getData(dc) instanceof SvnRepositoryLocation;
    } else {
      visible = ProjectLevelVcsManager.getInstance(project).checkVcsIsActive(SvnVcs.VCS_NAME);
    }
    e.getPresentation().setVisible(visible);
    e.getPresentation().setEnabled(enabled);
  }
@Override
  public void update(@NotNull AnActionEvent e)