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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)


return new Margin(attrs);
  }
  static mdp(attrs) {
    return new Mdp(attrs);
  }
  static medium(attrs) {
    return new Medium(attrs);
  }
  static message(attrs) {
    return new Message(attrs);
  }
  static numericEdit(attrs) {
    return new NumericEdit(attrs);
  }
  static occur(attrs) {
    return new Occur(attrs);
  }
  static oid(attrs) {
    return new Oid(attrs);
  }
  static oids(attrs) {
    return new Oids(attrs);
  }
  static overflow(attrs) {
    return new Overflow(attrs);
  }
  static pageArea(attrs) {
    return new PageArea(attrs);
  }
  static pageSet(attrs) {