public static CIKey getCommonKey(final String key) {
        if (key == null) {
            return null;
        } else {
            return KEY_TO_COMMON_CIKEY_MAP.get(key);
        }
    }
A set of static common {@link CIKey} instances
stroom-util-shared/src/main/java/stroom/util/shared/string/CIKeys.java