code: def update_deployment_targets(self, machines, project, deployment_group_id):
          
          route_values = {}
          if project is not None:
              route_values['project'] = self._serialize.url('project', project, 'str')
          if deployment_group_id is not None:
              route_values['deploymentGroupId'] = self._serialize.url('deployment_group_id', deployment_group_id, 'int')
          content = self._serialize.body(machines, '[DeploymentTargetUpdateParameter]')
          response = self._send(http_method='PATCH',
                                location_id='2f0aa599-c121-4256-a5fd-ba370e0ae7b6',
                                version='5.0-preview.1',
                                route_values=route_values,
                                content=content)
          return self._deserialize('[DeploymentMachine]', self._unwrap_collection(response))
docs: UpdateDeploymentTargets.
          [Preview API] Update tags of a list of deployment targets in a deployment group.
          :param [DeploymentTargetUpdateParameter] machines: Deployment targets with tags to udpdate.
          :param str project: Project ID or project name
          :param int deployment_group_id: ID of the deployment group in which deployment targets are updated.
          :rtype: [DeploymentMachine]