Attach (recommended) or Link to PDF file here:
issue13500 (in test corpus)

This regressed when landing #13566. 

What is the expected behavior? (add screenshot)
<img width="664" alt="image" src="https://user-images.githubusercontent.com/942640/122467522-7bc8aa80-cf6f-11eb-9d4d-311eb7c64fb2.png">


What went wrong? (add screenshot)
![image](https://user-images.githubusercontent.com/942640/122467565-85eaa900-cf6f-11eb-9c10-8a8686ed440c.png)


const style = toStyle("margin");
    const size = measureToString(this.size);
    style.width = style.height = size;
    let type;
    let className;
    let groupId;
    let id;
    const fieldId = this[$getParent]()[$getParent]()[$uid];
    const container = this[$getParent]()[$getParent]()[$getParent]();
    if (container instanceof ExclGroup) {
      groupId = container[$uid];
      type = "radio";
      className = "xfaRadio";