Method safeNumber

java/lib/src/main/java/io/github/ccxt/Exchange.java:11783–11788

(Object obj, Object key, Object... optionalArgs)

    }

    public Object safeNumber(Object obj, Object key, Object... optionalArgs)
    {
        Object defaultNumber = Helpers.getArg(optionalArgs, 0, null);
        Object value = this.safeString(obj, key);
        return this.parseNumber(value, defaultNumber);
    }

    public Object safeNumberN(Object obj, Object arr, Object... optionalArgs)
    {