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 (
      (this.layout.endsWith("-tb") &&
        this[$extra].attempt === 0 &&
        this[$extra].numberInLine > 0) ||
      this[$getParent]()[$isThereMoreWidth]()
    );
  }
  *[$getContainedChildren]() {
    
    
    yield* getContainedChildren(this);
  }
  [$flushHTML]() {
    return flushHTML(this);
  }
  [$addHTML](html, bbox) {
    addHTML(this, html, bbox);
  }
  [$getAvailableSpace]() {
    return getAvailableSpace(this);
  }
  [$isSplittable]() {
    
    
    const parent = this[$getSubformParent]();
    if (!parent[$isSplittable]()) {
      return false;
    }
    const contentArea = this[$getTemplateRoot]()[$extra].currentContentArea;
    if (this.overflow && this.overflow[$getExtra]().target === contentArea) {