public static <V> V put(final Map<CIKey, V> map,
                            final String key,
                            final V value) {
        return map.put(CIKey.of(key), value);
    }
Convert a {@link String} keyed map into a {@link CIKey} keyed map.
Accepts null keys, but not null values, and never returns a null.
stroom-util-shared/src/main/java/stroom/util/shared/string/CIKey.java