@Override
        public String toString() {
            StringBuilder sb = new StringBuilder("setOption_args(");
            boolean first = true;

            sb.append("key:");
            if (this.key == null) {
                sb.append("null");
            } else {
                sb.append(this.key);
            }
            first = false;
            if (!first) sb.append(", ");
            sb.append("value:");
            if (this.value == null) {
                sb.append("null");
            } else {
                sb.append(this.value);
            }
            first = false;
            sb.append(")");
            return sb.toString();
        }