/**
 * Implements hook_entity_view_display_alter().
 */
function {{ machine_name }}_entity_view_display_alter(\Drupal\Core\Entity\Display\EntityViewDisplayInterface $display, array $context) {
  // Leave field labels out of the search index.
  if ($context['entity_type'] == 'node' && $context['view_mode'] == 'search_index') {
    foreach ($display->getComponents() as $name => $options) {
      if (isset($options['label'])) {
        $options['label'] = 'hidden';
        $display->setComponent($name, $options);
      }
    }
  }
}