def write_conditional_formatting(range, cond_formats) #:nodoc:
      @writer.tag_elements('conditionalFormatting', [ ['sqref', range] ]) do
        cond_formats.each { |cond_format| cond_format.write_cf_rule }
      end
    end
def write_conditional_formatting(range, cond_formats) #:nodoc:
      @writer.tag_elements('conditionalFormatting', [ ['sqref', range] ]) do
        cond_formats.each { |cond_format| cond_format.write_cf_rule }
      end
    end
Write the <conditionalFormatting> element.