@Override
    public String toString() {
        return "TestObj{" +
            "str='" + str + '\'' +
            ", num=" + num +
            '}';
    }
@author <a href="mailto:zhanggeng.zg@antfin.com">GengZhang</a>
example/src/test/java/com/alipay/sofa/rpc/invoke/generic/TestObj.java