def has_in_members(self, member):
        """
        :calls: `GET /teams/:id/members/:user <http://developer.github.com/v3/orgs/teams>`_
        :param member: :class:`github.NamedUser.NamedUser`
        :rtype: bool
        """
        assert isinstance(member, github.NamedUser.NamedUser), member
        status, headers, data = self._requester.requestJson(
            "GET",
            self.url + "/members/" + member._identity
        )
        return status == 204