#fixed code
                                private static EnumMap<Level, String> createLevelStyleMap(final String[] options) {
        if (options.length < 2) {
            return DEFAULT_STYLES;
        }
        Map<String, String> styles = AnsiEscape.createMap(options[1]);
        EnumMap<Level, String> levelStyles = new EnumMap<Level, String>(DEFAULT_STYLES);
        for (Map.Entry<String, String> entry : styles.entrySet()) {
            final Level key = Level.valueOf(entry.getKey());
            if (key == null) {
                LOGGER.error("Unkown level name: " + entry.getKey());
            } else {
                levelStyles.put(key, entry.getValue());
            }
        }
        return levelStyles;
    }
#vulnerable code 
                                private static EnumMap<Level, String> createLevelStyleMap(final String[] options) {
        Map<String, String> styles = options.length < 2 ? null : AnsiEscape.createMap(options[1]);
        EnumMap<Level, String> levelStyles = new EnumMap<Level, String>(LEVEL_STYLES_DEFAULT);
        for (Map.Entry<String, String> entry : styles.entrySet()) {
            final Level key = Level.valueOf(entry.getKey());
            if (key == null) {
                LOGGER.error("Unkown level name: " + entry.getKey());
            } else {
                levelStyles.put(key, entry.getValue());
            }
        }
        return levelStyles;
    } 
                            #location 4 
                            #vulnerability type NULL_DEREFERENCE