.
	 *
	 * @param int   $post_parent The post parent.
	 * @param array $exclude_ids The id's to exclude.
	 *
	 * @return Indexable[] array of indexables.
	 */
	public function get_subpages_by_post_parent( $post_parent, $exclude_ids = [] ) {
		$query = $this->query()
			->where( 'post_parent', $post_parent )
			->where( 'object_type', 'post' )
			->where( 'post_status', 'publish' );

		if ( ! empty( $exclude_ids ) ) {
			$query->where_not_in( 'object_id', $exclude_ids );
		}
		return $query->find_many();
	}

	/**
	 * Updates the incoming link count for an indexable without first fetching it.
	 *
	 * @param int $indexable_id The indexable id.
	 * @param int $count        The incoming link count.
	 *
	 * @return bool Whether or not the update was succeful.
	 */
	public function update_incoming_link_count( $indexable_id, $count ) {
		return (bool) $this->query()
			->set( 'incoming_link_count', $count )
			->where( 'id', $indexable_id )
			->update_many();
	}

	/**
	 * Ensures that the given indexable has a permalink.
	 *
	 * @param Indexable $indexable The indexable.
	 *
	 * @return bool|Indexable The indexable.
	 */
	protected function ensure_permalink( $indexable ) {
		if ( $indexable && $indexable->permalink === null ) {
			$indexable->permalink = $this->permalink_helper->get_permalink_for_indexable( $indexable );

			// Only save if changed.
			if ( $indexable->permalink !== null ) {
				$indexable->save();
			}
		}
		return $indexable;
	}

	/* ********************* DEPRECATED METHODS ********************* */

	/**
	 * Returns all children of a given indexable.
	 *
	 * @deprecated 15.0
	 * @codeCoverageIgnore
	 *
	 * @param Indexable $indexable The indexable to find the children of.
	 *
	 * @return Indexable[] All children of the given indexable.
	 */
	public function get_children( Indexable $indexable ) {
		\_deprecated_function( __METHOD__, 'WPSEO 15.0' );

		$indexable_ids = $this->hierarchy_repository->find_children( $indexable );

		return $this->find_by_ids( $indexable_ids );
	}

	/**
	 * Resets the permalinks of the passed object type and subtype.
	 *
	 * @param string      $type    The type of the indexable. Can be null.
	 * @param null|string $subtype The subtype. Can be null.
	 *
	 * @return int|bool The number of permalinks changed if the query was succesful. False otherwise.
	 */
	public function reset_permalink( $type = null, $subtype = null ) {
		$query = $this->query()->set(
			[
				'permalink'      => null,
				'permalink_hash' => null,
			]
		);

		if ( $type !== null ) {
			$query->where( 'object_type', $type );
		}

		if ( $type !== null && $subtype !== null ) {
			$query->where( 'object_sub_type', $subtype );
		}

		return $query->update_many();
	}
}