private function getTerms(Node $node, string $field): array {
   $terms = $node->get($field)->referencedEntities();
   $response = [];
   foreach ($terms as $term) {
     $name = $term->getName();
     $tid = $term->id();
     $response[] = array(
       'name' => $name,
       'id' => $tid
     );
   }
   return $response;
 }