# File lib/spreadsheet/writer.rb, line 9
    def write workbook
      if @io_or_path.respond_to? :seek
        @io_or_path.binmode
        write_workbook workbook, @io_or_path
      else
        File.open(@io_or_path, "wb+") do |fh|
          write_workbook workbook, fh
        end
      end
    end