code: public function delete(string $name) : bool
      {
          $path = explode('.', $name);
          $key = $path[0];
          $file = $this->configFile($key);
  
          if (count($path) === 1) {
              if (file_exists($file)) {
                  if (unlink($file)) {
                      unset($this->cache[$key]);
                      return true;
                  }
  
                  return false;
              }
  
              return false;
          }
  
          if (!isset($this->cache[$key])) {
              if (!file_exists($file)) {
                  return false;
              }
  
              $this->cache[$key] = new ConfigHelper($this->readConfig($file));
          }
  
          if ($this->cache[$key]->delete($path)) {
              $this->writeConfig($file, $this->cache[$key]->getConfig());
              return true;
          }
  
          return false;
      }
docs: {@inheritdoc}