code: public function read(string $name, $default = null)
      {
          $path = explode('.', $name);
          $key = $path[0];
  
          if (!isset($this->cache[$key])) {
              $file = $this->configFile($key);
  
              if (!file_exists($file)) {
                  return $default;
              }
  
              $this->cache[$key] = new ConfigHelper($this->readConfig($file));
  
          }
  
          return $this->cache[$key]->get($path, $default);
      }
docs: {@inheritdoc}