:calls: `GET /repos/:owner/:repo/assignees/:assignee <http://developer.github.com/v3/issues/assignees>`_
        :param assignee: string or :class:`github.NamedUser.NamedUser`
        :rtype: bool

def has_in_assignees(self, assignee):
        """
        :calls: `GET /repos/:owner/:repo/assignees/:assignee <http://developer.github.com/v3/issues/assignees>`_
        :param assignee: string or :class:`github.NamedUser.NamedUser`
        :rtype: bool
        """
        assert isinstance(assignee, github.NamedUser.NamedUser) or isinstance(assignee, (str, unicode)), assignee

        if isinstance(assignee, github.NamedUser.NamedUser):
            assignee = assignee._identity

        status, headers, data = self._requester.requestJson(
            "GET",
            self.url + "/assignees/" + assignee
        )
        return status == 204