Call the service's API action to retrieve limit/quota information, and
        update AwsLimit objects in ``self.limits`` with this information.

def _update_limits_from_api(self):
        """
        Call the service's API action to retrieve limit/quota information, and
        update AwsLimit objects in ``self.limits`` with this information.
        """
        logger.debug('Setting CloudFormation limits from API')
        self.connect()
        resp = self.conn.describe_account_limits()
        for lim in resp['AccountLimits']:
            if lim['Name'] == 'StackLimit':
                self.limits['Stacks']._set_api_limit(lim['Value'])
                continue
            logger.debug('API response contained unknown CloudFormation '
                         'limit: %s', lim['Name'])