protected function createRelsFolderAndFile()
    {
        $this->relsFolder = $this->createFolder($this->rootFolder, self::RELS_FOLDER_NAME);

        $this->createRelsFile();

        return $this;
    }
protected function createRelsFolderAndFile()
    {
        $this->relsFolder = $this->createFolder($this->rootFolder, self::RELS_FOLDER_NAME);

        $this->createRelsFile();

        return $this;
    }
protected function createRelsFolderAndFile ( ) { $ this -> relsFolder = $ this -> createFolder ( $ this -> rootFolder , self :: RELS_FOLDER_NAME ) ; $ this -> createRelsFile ( ) ; return $ this ; }
Creates the "_rels" folder under the root folder as well as the ".rels" file in it

@return FileSystemHelper
@throws \Box\Spout\Common\Exception\IOException If unable to create the folder or the ".rels" file
Creates the _rels folder under the root folder as well as the . rels file in it