@Override
        public boolean equals(final Object o) {
            if (this == o) {
                return true;
            }
            if (o == null || getClass() != o.getClass()) {
                return false;
            }
            final CIString ciString = (CIString) o;
            return lowerKey.equals(ciString.lowerKey);
        }
@param normaliseKeys If true, all keys will be converted to lower case, else
                     will be left in their original case.
stroom-meta/stroom-meta-api/src/main/java/stroom/meta/api/CIStringHashMap.java