_nextPageToken = $token; } /** * @return string|null */ public function getNextPageToken():?string { return $this->_nextPageToken; } /** * @param File[] $files * * @return void */ public function setFiles(array $files):void { $this->_files = $files; } /** * @return File[] */ public function getFiles():array { return $this->_files; } /** * @param File $file * * @return void */ public function addFile(File $file):void { $this->_files[] = $file; } }