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 PageSet(attrs);
  }
  static para(attrs) {
    return new Para(attrs);
  }
  static passwordEdit(attrs) {
    return new PasswordEdit(attrs);
  }
  static pattern(attrs) {
    return new Pattern(attrs);
  }
  static picture(attrs) {
    return new Picture(attrs);
  }
  static proto(attrs) {
    return new Proto(attrs);
  }
  static radial(attrs) {
    return new Radial(attrs);
  }
  static reason(attrs) {
    return new Reason(attrs);
  }
  static reasons(attrs) {
    return new Reasons(attrs);
  }
  static rectangle(attrs) {
    return new Rectangle(attrs);
  }
  static ref(attrs) {