docs: def create_issue(self, title, body=github.GithubObject.NotSet, assignee=github.GithubObject.NotSet, milestone=github.GithubObject.NotSet, labels=github.GithubObject.NotSet, assignees=github.GithubObject.NotSet):
          """
          :calls: `POST /repos/:owner/:repo/issues <http://developer.github.com/v3/issues>`_
          :param title: string
          :param body: string
          :param assignee: string or :class:`github.NamedUser.NamedUser`
          :param assignees: list (of string or :class:`github.NamedUser.NamedUser`)
          :param milestone: :class:`github.Milestone.Milestone`
          :param labels: list of :class:`github.Label.Label`
          :rtype: :class:`github.Issue.Issue`
          """
          assert isinstance(title, (str, unicode)), title
          assert body is github.GithubObject.NotSet or isinstance(body, (str, unicode)), body
          assert assignee is github.GithubObject.NotSet or isinstance(assignee, github.NamedUser.NamedUser) or isinstance(assignee, (str, unicode)), assignee
          assert assignees is github.GithubObject.NotSet or all(isinstance(element, github.NamedUser.NamedUser) or isinstance(element, (str, unicode)) for element in assignees), assignees
          assert milestone is github.GithubObject.NotSet or isinstance(milestone, github.Milestone.Milestone), milestone
          assert labels is github.GithubObject.NotSet or all(isinstance(element, github.Label.Label) or isinstance(element, (str, unicode)) for element in labels), labels
  
          post_parameters = {
              "title": title,
          }
          if body is not github.GithubObject.NotSet:
              post_parameters["body"] = body
          if assignee is not github.GithubObject.NotSet:
              if isinstance(assignee, (str, unicode)):
                  post_parameters["assignee"] = assignee
              else:
                  post_parameters["assignee"] = assignee._identity
          if assignees is not github.GithubObject.NotSet:
              post_parameters["assignees"] = [element._identity if isinstance(element, github.NamedUser.NamedUser) else element for element in assignees]
          if milestone is not github.GithubObject.NotSet:
              post_parameters["milestone"] = milestone._identity
          if labels is not github.GithubObject.NotSet:
              post_parameters["labels"] = [element.name if isinstance(element, github.Label.Label) else element for element in labels]
          headers, data = self._requester.requestJsonAndCheck(
              "POST",
              self.url + "/issues",
              input=post_parameters
          )
          return github.Issue.Issue(self._requester, headers, data, completed=True)