code: def get_policy_configuration_revision(self, project, configuration_id, revision_id):
          
          route_values = {}
          if project is not None:
              route_values['project'] = self._serialize.url('project', project, 'str')
          if configuration_id is not None:
              route_values['configurationId'] = self._serialize.url('configuration_id', configuration_id, 'int')
          if revision_id is not None:
              route_values['revisionId'] = self._serialize.url('revision_id', revision_id, 'int')
          response = self._send(http_method='GET',
                                location_id='fe1e68a2-60d3-43cb-855b-85e41ae97c95',
                                version='5.0',
                                route_values=route_values)
          return self._deserialize('PolicyConfiguration', response)
docs: GetPolicyConfigurationRevision.
          Retrieve a specific revision of a given policy by ID.
          :param str project: Project ID or project name
          :param int configuration_id: The policy configuration ID.
          :param int revision_id: The revision ID.
          :rtype: :class:`<PolicyConfiguration> <azure.devops.v5_0.policy.models.PolicyConfiguration>`