*
     * @param pattern a pattern.
     */
    public final void setIgnorePattern(Pattern pattern) {
        ignorePattern = pattern;
    }

    @Override
    public int[] getDefaultTokens() {
        return getAcceptableTokens();
    }

    @Override
    public int[] getAcceptableTokens() {
        return new int[] {
            TokenTypes.INTERFACE_DEF,