public function add_hooks() {
		// Check if photos are attached to a vehicle parent.
		add_action( 'add_attachment', array( __CLASS__, 'maybe_number_photo' ), 10, 1 );
		add_action( 'edit_attachment', array( __CLASS__, 'maybe_number_photo' ), 10, 1 );

		/**
		 * Put the sequence number in the title of the post to which photos are
		 * attached in the Media Library table view.
		 */
		add_filter( 'the_title', array( $this, 'add_sequence_number_to_titles' ), 10, 2 );
	}