public function add_hooks() {
		add_filter( 'posts_clauses', array( $this, 'enable_order_by_attachment_count' ), 1, 2 );

		// Add columns to the table that lists all the Vehicles on edit.php.
		add_filter( 'manage_' . INVP::POST_TYPE . '_posts_columns', array( $this, 'add_columns_to_vehicles_table' ) );

		// Populate the columns we added to the Vehicles table.
		add_action( 'manage_' . INVP::POST_TYPE . '_posts_custom_column', array( $this, 'populate_columns_we_added_to_vehicles_table' ), 10, 2 );

		// Make our added columns to the Vehicles table sortable.
		add_filter( 'manage_edit-' . INVP::POST_TYPE . '_sortable_columns', array( $this, 'make_vehicles_table_columns_sortable' ) );

		// Implement the orderby for each of these added columns.
		add_filter( 'pre_get_posts', array( $this, 'vehicles_table_columns_orderbys' ) );

		add_action( 'admin_enqueue_scripts', array( $this, 'scripts_and_styles' ) );
	}