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.
}
    const style = toStyle(this, "font", "margin", "visibility");
    switch (this.placement) {
      case "left":
      case "right":
        if (this.reserve > 0) {
          style.width = measureToString(this.reserve);
        }
        break;
      case "top":
      case "bottom":
        if (this.reserve > 0) {
          style.height = measureToString(this.reserve);
        }
        break;
    }
    setPara(this, null, value);
    this[$popPara]();
    this.reserve = savedReserve;
    return HTMLResult.success({
      name: "div",
      attributes: {
        style,
        class: ["xfaCaption"],
      },
      children,
    });
  }
}
class Certificate extends StringObject {