Method safeStringUpper

java/lib/src/main/java/io/github/ccxt/Exchange.java:1024–1026

(Object obj, Object key, Object... defaultValue)

    }

    public Object safeStringUpper(Object obj, Object key, Object... defaultValue) {
        return SafeMethods.safeStringUpper(obj, key, defaultValue);
    }

    public Object safeStringUpper2(Object obj, Object key1, Object key2, Object... defaultValue) {
        return SafeMethods.safeStringUpper2(obj, key1, key2, defaultValue);