'Get realms associated with a request token.
:param token: The request token string.
:param request: An oauthlib.common.Request object.
:returns: The list of realms associated with the request token.
This method is used by
* AuthorizationEndpoint
* AccessTokenEndpoint'

def get_realms(self, token, request):

    raise self._subclass_must_implement(u'get_realms')
