# File lib/spreadsheet/excel/writer/n_worksheet.rb, line 344
  def write_colinfos
    cols = @worksheet.columns
    bunch = []
    cols.each_with_index do |column, idx|
      if column
        bunch << column
        if cols[idx.next] != column
          write_colinfo bunch
          bunch.clear
        end
      end
    end
  end