const expandNormalizedTimeline = (state, timeline, statuses, next, isPartial, isLoadingRecent, usePendingItems) => {
  // This method is pretty tricky because:
  // - existing items in the timeline might be out of order
  // - the existing timeline may have gaps, most often explicitly noted with a `null` item
  // - ideally, we don't want it to reorder existing items of the timeline