//group zero is ignored during treatment
//replacement for the first
cr1.addReplacement(1, "1st group");
//no replacement for the second group it will remains the same
//empty string for the third group it will be deleted
cr1.addReplacement(3, "");
//no replacement for the third group it will remains the same
conversionRuleList = new ArrayList<ConversionRule>();
conversionRuleList.add(cr);
conversionRuleList.add(cr1);