original_string: protected function createMimetypeFile()
      {
          $this->createFileWithContents($this->rootFolder, self::MIMETYPE_FILE_NAME, self::MIMETYPE);
          return $this;
      }
code: protected function createMimetypeFile()
      {
          $this->createFileWithContents($this->rootFolder, self::MIMETYPE_FILE_NAME, self::MIMETYPE);
          return $this;
      }
code_tokens: protected function createMimetypeFile ( ) { $ this -> createFileWithContents ( $ this -> rootFolder , self :: MIMETYPE_FILE_NAME , self :: MIMETYPE ) ; return $ this ; }
docstring: Creates the "mimetype" file under the root folder
  
  @return FileSystemHelper
  @throws \Box\Spout\Common\Exception\IOException If unable to create the file
docstring_tokens: Creates the mimetype file under the root folder