'Retrieves the topics in the service namespace.'

def list_topics(self):

    request = HTTPRequest()
    request.method = 'GET'
    request.host = self._get_host()
    request.path = '/$Resources/Topics'
    (request.path, request.query) = self._httpclient._update_request_uri_query(request)
    request.headers = self._update_service_bus_header(request)
    response = self._perform_request(request)
    return _ETreeXmlToObject.convert_response_to_feeds(response, _convert_etree_element_to_topic)
