How to use the @nteract/commutable.emptyMarkdownCell.set function in @nteract/commutable

["metadata", "kernelspec", "name"],
    "python2"
  );

  if (config) {
    if (config.codeCellCount) {
      for (let i = 1; i < config.codeCellCount; i++) {
        notebook = appendCellToNotebook(notebook, emptyCodeCell);
      }
    }

    if (config.markdownCellCount) {
      for (let i = 0; i < config.markdownCellCount; i++) {
        notebook = appendCellToNotebook(
          notebook,
          emptyMarkdownCell.set("cell_type", "markdown")
        );
      }
    }

    if (config.hideAll) {
      notebook = hideCells(notebook);
    }
  }

  return notebook;
}