Method subtract

java/lib/src/main/java/io/github/ccxt/Helpers.java:398–411

(Object a, Object b)

// }

    public static Object subtract(Object a, Object b) {
        a = normalizeIntIfNeeded(a);
        b = normalizeIntIfNeeded(b);

        if (a instanceof Long && b instanceof Long) {
            return ((Long) a) - ((Long) b);
        } else if (a instanceof Integer && b instanceof Integer) {
            return ((Integer) a) - ((Integer) b);
        } else if (a instanceof Double || b instanceof Double) {
            return toDouble(a) - toDouble(b);
        } else {
            return null;
        }
    }

    // public static int subtract(int a, int b) { return a - b; }