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 true;
  }
  [$hasSettableValue]() {
    return true;
  }
  [$setValue](value) {
    for (const field of this.field.children) {
      if (!field.value) {
        const nodeValue = new Value({});
        field[$appendChild](nodeValue);
        field.value = nodeValue;
      }
      field.value[$setValue](value);
    }
  }
  [$isThereMoreWidth]() {
    return (
      (this.layout.endsWith("-tb") &&
        this[$extra].attempt === 0 &&
        this[$extra].numberInLine > 0) ||
      this[$getParent]()[$isThereMoreWidth]()
    );
  }
  [$isSplittable]() {