old_contents: #    Licensed under the Apache License, Version 2.0 (the "License"); you may
  #    not use this file except in compliance with the License. You may obtain
  #    a copy of the License at
  #
  #         http://www.apache.org/licenses/LICENSE-2.0
  #
  #    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.
  
  __all__ = ['CatchErrors',
             'CorrelationId',
             'Debug',
             'RequestId',
             'RequestBodySizeLimiter']
  
  from oslo_middleware.catch_errors import CatchErrors
  from oslo_middleware.correlation_id import CorrelationId
  from oslo_middleware.debug import Debug
  from oslo_middleware.request_id import RequestId
  from oslo_middleware.sizelimit import RequestBodySizeLimiter
  
new_contents: #    Licensed under the Apache License, Version 2.0 (the "License"); you may
  #    not use this file except in compliance with the License. You may obtain
  #    a copy of the License at
  #
  #         http://www.apache.org/licenses/LICENSE-2.0
  #
  #    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.
  
  __all__ = ['CatchErrors',
             'CorrelationId',
             'Debug',
             'Healthcheck',
             'RequestId',
             'RequestBodySizeLimiter']
  
  from oslo_middleware.catch_errors import CatchErrors
  from oslo_middleware.correlation_id import CorrelationId
  from oslo_middleware.debug import Debug
  from oslo_middleware.healthcheck import Healthcheck
  from oslo_middleware.request_id import RequestId
  from oslo_middleware.sizelimit import RequestBodySizeLimiter
  
subject: add shortcut to healthcheck middleware