hook_feeds_presave: $entity_id is missing

The $entity_id is missing from function signature in feeds.api.php as it appears below:

/**
 * Invoked before a feed item is saved.
 *
 * @param FeedsSource $source
 *  FeedsSource object that describes the source that is being imported.
 * @param $entity
 *   The entity object.
 * @param array $item
 *   The parser result for this entity.
 * @param int|null $entity_id
 *  The id of the current item which is going to be updated. If this is a new
 *  item, then NULL is passed.
 */
function hook_feeds_presave(FeedsSource $source, $entity, $item) {
  if ($entity->feeds_item->entity_type == 'node') {
    // Skip saving this entity.
    $entity->feeds_item->skip = TRUE;
  }
}