How to add body classes depending on a Cortex route - the right way. about cortex HOT 2 CLOSED

use Brain\Cortex\Router\MatchingResult;

add_action('cortex.matched', function(MatchingResult $results) {

    $route = $results->route();
    $matches = $results->matches();
    $matchedPath = $results->matchedPath();
    $template = $results->template();

    // calculate classes here based  on info above...
    $customClasses = [];

    add_filter('body_class', function ($classes) use ($customClasses) {
        return array_merge($classes, $customClasses);
    });

});

namespace Wujekbogdan\Project;

/**
 * @param array $vars
 * @param \WP $wp
 * @param string|false $template
 * @param array $matches
 */
function setupBodyClassesForRoute(array $vars, \WP $wp, $template, array $matches) {

    // calculate classes here based parameters
    $customClasses = [];

    add_filter('body_class', function ($classes) use ($customClasses) {
        return array_merge($classes, $customClasses);
    });
}

$routes->addRoute(new QueryRoute(
        '/my/route',
        function (array $matches) {
            return [
                // params
            ];
        },
        [
            'after' => 'Wujekbogdan\Project\setupBodyClassesForRoute'
        ]
    ));