Lists a file's revisions. For more information, see Manage file revisions. Important: The list of revisions returned by this method might be incomplete for files with a large revision history, including frequently edited Google Docs, Sheets, and Slides. Older revisions might be omitted from the response, meaning the first revision returned may not be the oldest existing revision. The revision history visible in the Workspace editor user interface might be more complete than the list returned by the API.