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 (!this[$extra]) {
      this[$extra] = {
        numberOfUse: 1,
        pageIndex: -1,
        pageSetIndex: -1,
      };
    }
    if (this.relation === "orderedOccurrence") {
      if (this[$extra].pageIndex + 1 < this.pageArea.children.length) {
        this[$extra].pageIndex += 1;
        const pageArea = this.pageArea.children[this[$extra].pageIndex];
        return pageArea[$getNextPage]();
      }
      if (this[$extra].pageSetIndex + 1 < this.pageSet.children.length) {
        this[$extra].pageSetIndex += 1;
        return this.pageSet.children[this[$extra].pageSetIndex][$getNextPage]();
      }
      if (this[$isUsable]()) {
        this[$extra].numberOfUse += 1;
        this[$extra].pageIndex = -1;
        this[$extra].pageSetIndex = -1;
        return this[$getNextPage]();
      }
      const parent = this[$getParent]();
      if (parent instanceof PageSet) {