docs: def get_cards(self, archived_state=github.GithubObject.NotSet):
          """
          :calls: `GET /projects/columns/:column_id/cards <https://developer.github.com/v3/projects/cards/#list-project-cards>`_
          :rtype: :class:`github.PaginatedList.PaginatedList` of :class:`github.ProjectCard.ProjectCard`
          :param archived_state: string
          """
          assert archived_state is github.GithubObject.NotSet or isinstance(archived_state, (str, unicode)), archived_state
  
          url_parameters = dict()
          if archived_state is not github.GithubObject.NotSet:
              url_parameters["archived_state"] = archived_state
  
          return github.PaginatedList.PaginatedList(
              github.ProjectCard.ProjectCard,
              self._requester,
              self.url + "/cards",
              url_parameters,
              {"Accept": Consts.mediaTypeProjectsPreview}
          )