text: #    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 oslo_versionedobjects import base as ovo_base
  
  
  class VersionedObject(ovo_base.VersionedObject):
  
      OBJ_PROJECT_NAMESPACE = 'os_vif'
  
  
  class VersionedObjectPrintableMixin(object):
      """Mix-in to implement __str__ method for a versioned object
  
      If a versioned object needs to be printable in a easy-reading format,
      inherit from this class.
      """
  
      def __str__(self):
          if callable(getattr(self, 'obj_to_primitive', None)):
              return str(self.obj_to_primitive())
          return super(VersionedObjectPrintableMixin, self).__str__()
  