getArgument('folder_id'); if ((string)$folderId !== $input->getArgument('folder_id')) { // Protect against removing folderId === 0 when typing a string (e.g. folder name instead of folder id) $output->writeln('Folder id argument is not an integer. Got ' . $input->getArgument('folder_id') . ''); return null; } $folder = $this->folderManager->getFolder($folderId); if ($folder === null) { $output->writeln('Folder not found: ' . $folderId . ''); return null; } return $folder; } }