The following code is flagged as dead (since it's *replacing* rather than updating the existing Object):
https://github.com/mozilla/pdf.js/blob/4483cba72410027acf46630ebf252ae529704476/src/core/xfa/template.js#L2336-L2339
according to the alert in https://github.com/mozilla/pdf.js/security/code-scanning/103?query=ref%3Arefs%2Fheads%2Fmaster

Looking at the surrounding code, I can see a couple of possibilities here:
 1. This is indeed just dead code, which should be removed.
 2. The code should be moved up, and placed just *above* the previous block instead.
 3. There should be other, more invasive, changes made to this code...

/cc @calixteman Which solution is correct here?
Assuming it's either option 1 or 2, I can submit a patch to fix this.
return new Certificates(attrs);
  }
  static checkButton(attrs) {
    return new CheckButton(attrs);
  }
  static choiceList(attrs) {
    return new ChoiceList(attrs);
  }
  static color(attrs) {
    return new Color(attrs);
  }
  static comb(attrs) {
    return new Comb(attrs);
  }
  static connect(attrs) {
    return new Connect(attrs);
  }
  static contentArea(attrs) {
    return new ContentArea(attrs);
  }
  static corner(attrs) {
    return new Corner(attrs);
  }
  static date(attrs) {
    return new DateElement(attrs);
  }
  static dateTime(attrs) {
    return new DateTime(attrs);
  }
  static dateTimeEdit(attrs) {