code: public function load($filePath = null, $restoreIfNotFound = false, $restorePath = null)
      {
          $this->resetContent();
  
          if (! is_null($filePath)) {
              $this->filePath = $filePath;
          } else {
              if (method_exists($this->app, 'environmentPath') && method_exists($this->app, 'environmentFile')) {
                  $this->filePath = $this->app->environmentPath().'/'.$this->app->environmentFile();
              } else {
                  $this->filePath = __DIR__.'/../../../../../../.env';
              }
          }
  
          $this->reader->load($this->filePath);
  
          if (file_exists($this->filePath)) {
              $this->writer->setBuffer($this->getContent());
              return $this;
          } elseif ($restoreIfNotFound) {
              return $this->restore($restorePath);
          } else {
              return $this;
          }
      }
docs: Load file for working
  
  @param  string|null  $filePath           The file path
  @param  boolean      $restoreIfNotFound  Restore this file from other file if it's not found
  @param  string|null  $restorePath        The file path you want to restore from
  
  @return DotenvEditor