code: public static function register($id, string $className): void
      {
          @trigger_error(sprintf('"%s" is deprecated. Use "registerManifest" instead.', __CLASS__), E_USER_DEPRECATED);
  
          if ($id instanceof SchemaId) {
              $id = $id->getCurieMajor();
          }
  
          $nextId = count(self::$curies) + 20000;
          self::$curies[$id] = $nextId;
          self::$classes[$nextId] = $className;
      }
docs: Adds a single schema id and class name.
  @see SchemaId::getCurieMajor
  
  @param SchemaId|string $id
  @param string          $className