@Override
        public Comparator<Val> getComparator(final boolean isCaseSensitive) {
            return isCaseSensitive
                    ? caseSensitiveComparator
                    : caseInsensitiveComparator;
        }
@return True if neither value has a decimal part.
stroom-query/stroom-query-language/src/main/java/stroom/query/language/functions/ValComparators.java