Copyright (c) 2020 Huawei Technologies Co., Ltd.
Licensed under CC BY-NC-SA 4.0 (Attribution-NonCommercial-ShareAlike 4.0 International) (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    https://creativecommons.org/licenses/by-nc-sa/4.0/legalcode

The code is released for academic research use only. For commercial use, please contact Huawei Technologies Co., Ltd.
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.