}
    if (oldEntryForValue != null) {
      oldEntryForValue.prevInKeyInsertionOrder = null;
      oldEntryForValue.nextInKeyInsertionOrder = null;
    }
    rehashIfNecessary();
    return Maps.keyOrNull(oldEntryForValue);
  }

  private void rehashIfNecessary() {
    @Nullable BiEntry<K, V>[] oldKToV = hashTableKToV;
    if (Hashing.needsResizing(size, oldKToV.length, LOAD_FACTOR)) {