@NotNull
  public static MarkdownHeader createSetext(@NotNull Project project, @NotNull String text, @NotNull String symbol, int count) {
    return (MarkdownHeader)createFile(project, text + "\n" + StringUtil.repeat(symbol, count)).getFirstChild();
  }
@NotNull
  public static MarkdownHeader createSetext(@NotNull Project project, @NotNull String text, @NotNull String symbol, int count)