docs: def get_issues(self, filter=github.GithubObject.NotSet, state=github.GithubObject.NotSet, labels=github.GithubObject.NotSet, sort=github.GithubObject.NotSet, direction=github.GithubObject.NotSet, since=github.GithubObject.NotSet):
          """
          :calls: `GET /issues <http://developer.github.com/v3/issues>`_
          :rtype: :class:`github.PaginatedList.PaginatedList` of :class:`github.Issue.Issue`
          :param filter: string
          :param state: string
          :param labels: list of :class:`github.Label.Label`
          :param sort: string
          :param direction: string
          :param since: datetime.datetime
          :rtype: :class:`github.PaginatedList.PaginatedList` of :class:`github.Issue.Issue`
          """
          assert filter is github.GithubObject.NotSet or isinstance(filter, (str, unicode)), filter
          assert state is github.GithubObject.NotSet or isinstance(state, (str, unicode)), state
          assert labels is github.GithubObject.NotSet or all(isinstance(element, github.Label.Label) for element in labels), labels
          assert sort is github.GithubObject.NotSet or isinstance(sort, (str, unicode)), sort
          assert direction is github.GithubObject.NotSet or isinstance(direction, (str, unicode)), direction
          assert since is github.GithubObject.NotSet or isinstance(since, datetime.datetime), since
          url_parameters = dict()
          if filter is not github.GithubObject.NotSet:
              url_parameters["filter"] = filter
          if state is not github.GithubObject.NotSet:
              url_parameters["state"] = state
          if labels is not github.GithubObject.NotSet:
              url_parameters["labels"] = ",".join(label.name for label in labels)
          if sort is not github.GithubObject.NotSet:
              url_parameters["sort"] = sort
          if direction is not github.GithubObject.NotSet:
              url_parameters["direction"] = direction
          if since is not github.GithubObject.NotSet:
              url_parameters["since"] = since.strftime("%Y-%m-%dT%H:%M:%SZ")
          return github.PaginatedList.PaginatedList(
              github.Issue.Issue,
              self._requester,
              "/issues",
              url_parameters
          )