The annotation reference tests now show the date/time placeholder, but since localization is not active we don't see the actual date/time string. It would be nice to be able to have this in the reference images.
if (typeof e !== "object") {
      return String(e);
    }
    if (!("message" in e)) {
      return JSON.stringify(e);
    }
    return e.message + ("stack" in e ? " at " + e.stack.split("\n")[0] : "");
  }
  _getLastPageNumber(task) {
    if (!task.pdfDoc) {
      return task.firstPage || 1;
    }
    return task.lastPage || task.pdfDoc.numPages;
  }
  _nextPage(task, loadError) {