Method unique

java/lib/src/main/java/io/github/ccxt/Exchange.java:1357–1375

(Object obj)

    }

    public static List<Object> unique(Object obj) {
        if (!(obj instanceof List<?> list)) {
            return null; // not a []string equivalent
        }

        // ensure it's actually a List<String>
        for (Object e : list) {
            if (!(e instanceof String)) {
                return null;
            }
        }

        // preserve order while deduplicating
        var seen = new LinkedHashSet<Object>();
        for (Object e : list) {
            seen.add((String) e);
        }
        return new ArrayList<Object>(seen);
    }

    public int parseTimeframe(Object timeframe2) {
        if (timeframe2 == null) {