Embeber bloque facets

https://drupal.stackexchange.com/questions/241298/load-block-programmatically-result-drupal-render-placeholder

$block = Drupal::entityManager()->getStorage(block)->load(contextualcart);

$block = Drupal::entityManager() ->getViewBuilder(block) ->view($block);

$blockMarkup = Drupal::service(renderer)->render($block);