code: public function load($pFilename)
      {
          // Create new Spreadsheet
          $spreadsheet = new Spreadsheet();
          $spreadsheet->removeSheetByIndex(0);
  
          // Load into this instance
          return $this->loadIntoExisting($pFilename, $spreadsheet);
      }
docs: Loads Spreadsheet from file.
  
  @param string $pFilename
  
  @throws Exception
  
  @return Spreadsheet