te our own "has title
  // and category" function rather than having it provided by TimedEvent.
  // This should be fixed.
  // https://github.com/catapult-project/catapult/issues/2784
  function hasTitleAndCategory(event, title, category) {
    return event.title === title && event.category &&
      tr.b.getCategoryParts(event.category).includes(category);
  }

  function getNavStartTimestamps(rendererHelper) {
    const navStartTimestamps = [];
    for (const e of rendererHelper.mainThread.sliceGroup.chil