The spec for this action:
https://www.adobe.com/content/dam/acom/en/devnet/pdf/pdfs/PDF32000_2008.pdf#G11.2111850
An example of a form using this action:
https://www2.illinois.gov/rev/forms/reg/Documents/reg-1-mr.pdf
i.parent.items.push(outlineItem);
      obj = outlineDict.getRaw("First");
      if (isRef(obj) && !processed.has(obj)) {
        queue.push({ obj, parent: outlineItem });
        processed.put(obj);
      }
      obj = outlineDict.getRaw("Next");
      if (isRef(obj) && !processed.has(obj)) {
        queue.push({ obj, parent: i.parent });
        processed.put(obj);
      }
    }
    return root.items.length > 0 ? root.items : null;
  }
  get permissions() {
    let permissions = null;
    try {
      permissions = this._readPermissions();
    } catch (ex) {
      if (ex instanceof MissingDataException) {
        throw ex;
      }
      warn("Unable to read permissions.");
    }
    return shadow(this, "permissions", permissions);
  }
  /**
   * @private
   */
  _readPermissions() {