*/
    public static void assertArgument(final String argName, final boolean expression, final String description) {
        if (!expression) {
            throw new ClIllegalArgumentException(argName, "ECL0009", asArray(argName, description));
        }
    }

    /**
     * Asserts that the state is not invalid.
     *
     * @param expression
     *            The precondition.
     * @param description