'List all the volume_types extra specs created.
TODO: Current api-site doesn\'t contain this API description.
After fixing the api-site, we need to fix here also for putting
the link to api-site.'

def list_volume_types_extra_specs(self, volume_type_id, **params):

    url = ('types/%s/extra_specs' % volume_type_id)
    if params:
        url += ('?%s' % urllib.urlencode(params))
    (resp, body) = self.get(url)
    body = json.loads(body)
    self.expected_success(200, resp.status)
    return rest_client.ResponseBody(resp, body)
