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">

return new RefElement(attrs);
  }
  static script(attrs) {
    return new Script(attrs);
  }
  static setProperty(attrs) {
    return new SetProperty(attrs);
  }
  static signData(attrs) {
    return new SignData(attrs);
  }
  static signature(attrs) {
    return new Signature(attrs);
  }
  static signing(attrs) {
    return new Signing(attrs);
  }
  static solid(attrs) {
    return new Solid(attrs);
  }
  static speak(attrs) {
    return new Speak(attrs);
  }
  static stipple(attrs) {
    return new Stipple(attrs);
  }
  static subform(attrs) {
    return new Subform(attrs);
  }
  static subformSet(attrs) {