| # Copyright 2020 The LUCI Authors. All rights reserved. | |
| # Use of this source code is governed under the Apache License, Version 2.0 | |
| # that can be found in the LICENSE file. | |
| # A class to use to send HTTP requests. Can be changed by 'set_engine_class'. | |
| # Default is RequestsLibEngine. | |
| _request_engine_cls = None |