restoreItem.ts

const restoreItem = ({ id, isFolder }: { id: string; isFolder: boolean }): void => {
  if (isFolder) {
    throw new Error('Not implemented');
  } else {
    const deletedFile = DriveApp.getFileById(id);
    if (deletedFile.isTrashed()) {
      const newFile = deletedFile.makeCopy(deletedFile.getName());
      const parents = deletedFile.getParents();
      while (parents.hasNext()) {
        const parent = parents.next();
        parent.addFile(newFile);
      }
    }
  }
};