rollback method
Rolls back a transaction.
Throws a http.ClientException if there were problems communicating with
the API service. Throws a ServiceException if the API method failed for
any reason.
Implementation
Future<void> rollback(RollbackRequest request) async {
final url = _endPoint.replace(
path: '/v1/${request.database}/documents:rollback',
);
await _client.post(url, body: request);
}