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