Attach (recommended) or Link to PDF file here:
https://web.archive.org/web/20210607145115/https://www.hsbc.fr/content/dam/hsbc/fr/docs/pib/Contestation-Transaction-Carte-Bancaire.pdf
(in the test corpus)

What is the expected behavior? (add screenshot)
<img width="175" alt="image" src="https://user-images.githubusercontent.com/942640/121593583-f8e4a480-c9f0-11eb-8901-2b3b63bb34c0.png">

What went wrong? (add screenshot)
<img width="124" alt="image" src="https://user-images.githubusercontent.com/942640/121593765-1a459080-c9f1-11eb-8695-461ef4e65c3d.png">

const children = [];
    if (!this[$extra]) {
      this[$extra] = Object.create(null);
    }
    this[$extra].children = children;
    this[$childrenToHTML]({
      filter: new Set(["subform", "subformSet"]),
      include: true,
    });
    return HTMLResult.success({
      name: "div",
      children,
      attributes: {
        id: this[$uid],
      },
    });
  }
}
class SubjectDN extends ContentObject {