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.
if (!node || !node.border) {
    return { w: 0, h: 0 };
  }
  const borderExtra = node.border[$getExtra]();
  if (!borderExtra) {
    return { w: 0, h: 0 };
  }
  return {
    w:
      borderExtra.widths[0] +
      borderExtra.widths[2] +
      borderExtra.insets[0] +
      borderExtra.insets[2],
    h:
      borderExtra.widths[1] +
      borderExtra.widths[3] +
      borderExtra.insets[1] +
      borderExtra.insets[3],
  };
}
function hasMargin(node) {