Method stringSub

java/lib/src/main/java/io/github/ccxt/base/Precise.java:244–249

(Object string1, Object string2)

    }

    public static String stringSub(Object string1, Object string2) {
        if (string1 == null || string2 == null) return null;
        return new Precise(String.valueOf(string1))
                .sub(new Precise(String.valueOf(string2)))
                .toString();
    }

    public static String stringAdd(Object string1, Object string2) {
        if (string1 == null || string2 == null) return null;