public static CIKey trimmed(final String key) {
        if (key == null) {
            return EMPTY_STRING;
        } else {
            final String trimmed = key.trim();
            return CIKey.of(trimmed);
        }
    }
Equivalent to calling {@link CIKey#of(String)} with a trimmed key.
stroom-util-shared/src/main/java/stroom/util/shared/string/CIKey.java