':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):

    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)
