original_string: protected function createXlRelsFolder()
      {
          $this->xlRelsFolder = $this->createFolder($this->xlFolder, self::RELS_FOLDER_NAME);
          return $this;
      }
code: protected function createXlRelsFolder()
      {
          $this->xlRelsFolder = $this->createFolder($this->xlFolder, self::RELS_FOLDER_NAME);
          return $this;
      }
code_tokens: protected function createXlRelsFolder ( ) { $ this -> xlRelsFolder = $ this -> createFolder ( $ this -> xlFolder , self :: RELS_FOLDER_NAME ) ; return $ this ; }
docstring: Creates the "_rels" folder under the "xl" folder
  
  @return FileSystemHelper
  @throws \Box\Spout\Common\Exception\IOException If unable to create the folder
docstring_tokens: Creates the _rels folder under the xl folder