code: def create_pull_request_iteration_status(self, status, repository_id, pull_request_id, iteration_id, project=None):
          
          route_values = {}
          if project is not None:
              route_values['project'] = self._serialize.url('project', project, 'str')
          if repository_id is not None:
              route_values['repositoryId'] = self._serialize.url('repository_id', repository_id, 'str')
          if pull_request_id is not None:
              route_values['pullRequestId'] = self._serialize.url('pull_request_id', pull_request_id, 'int')
          if iteration_id is not None:
              route_values['iterationId'] = self._serialize.url('iteration_id', iteration_id, 'int')
          content = self._serialize.body(status, 'GitPullRequestStatus')
          response = self._send(http_method='POST',
                                location_id='75cf11c5-979f-4038-a76e-058a06adf2bf',
                                version='5.0-preview.1',
                                route_values=route_values,
                                content=content)
          return self._deserialize('GitPullRequestStatus', response)
docs: CreatePullRequestIterationStatus.
          [Preview API] Create a pull request status on the iteration. This operation will have the same result as Create status on pull request with specified iteration ID in the request body.
          :param :class:`<GitPullRequestStatus> <azure.devops.v5_0.git.models.GitPullRequestStatus>` status: Pull request status to create.
          :param str repository_id: The repository ID of the pull request’s target branch.
          :param int pull_request_id: ID of the pull request.
          :param int iteration_id: ID of the pull request iteration.
          :param str project: Project ID or project name
          :rtype: :class:`<GitPullRequestStatus> <azure.devops.v5_0.git.models.GitPullRequestStatus>`