private String makeExpression(TreeLogger logger, ResourceContext context,
CssStylesheet sheet)
throws UnableToCompleteException {
try {
String standard = makeExpression(logger, context, sheet, obfuscationStyle.isPretty());
(new RtlVisitor()).accept(sheet);
String reversed = makeExpression(logger, context, sheet, obfuscationStyle.isPretty());
if (standard.equals(reversed)) {
return standard;
} else {