code: public function restore($filePath = null)
      {
          if (is_null($filePath)) {
              $latestBackup = $this->getLatestBackup();
              if (is_null($latestBackup)) {
                  throw new NoBackupAvailableException("There are no available backups!");
              }
              $filePath = $latestBackup['filepath'];
          }
  
          if (!is_file($filePath)) {
              throw new FileNotFoundException("File does not exist at path {$filePath}");
          }
  
          copy($filePath, $this->filePath);
          $this->writer->setBuffer($this->getContent());
  
          return $this;
      }
docs: Restore the loaded file from latest backup file or from special file.
  
  @param  string|null  $filePath
  
  @return DotenvEditor