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.
  
  
  from keystoneauth.exceptions import base
  
  __all__ = ['CatalogException',
             'EmptyCatalog',
             'EndpointNotFound']
  
  
  class CatalogException(base.ClientException):
      """Something is rotten in Service Catalog."""
  
  
  class EmptyCatalog(CatalogException):
      """The service catalog is empty."""
      pass
  
  
  class EndpointNotFound(CatalogException):
      """Could not find requested endpoint in Service Catalog."""
      pass
  
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.
  
  
  from keystoneauth.exceptions import base
  
  __all__ = ['CatalogException',
             'EmptyCatalog',
             'EndpointNotFound']
  
  
  class CatalogException(base.ClientException):
      """Something is rotten in Service Catalog."""
  
  
  class EndpointNotFound(CatalogException):
      """Could not find requested endpoint in Service Catalog."""
      pass
  
  
  class EmptyCatalog(EndpointNotFound):
      """The service catalog is empty."""
      pass
  
subject: Reorder catalog exceptions