/**
         * A factory method allowing the creation of conditional formatting
         *  rules using an Icon Set / Multi-State formatting.
         * The thresholds for it will be created, but will be empty
         *  and require configuring with
         *  {@link XSSFConditionalFormattingRule#getMultiStateFormatting()}
         *  then
         *  {@link XSSFIconMultiStateFormatting#getThresholds()}
         */
        public IConditionalFormattingRule CreateConditionalFormattingRule(IconSet iconSet)
        {
            XSSFConditionalFormattingRule rule = new XSSFConditionalFormattingRule(_sheet);

            // Have it setup, with suitable defaults
            rule.CreateMultiStateFormatting(iconSet);

            // All done!
            return(rule);
        }