public function setConfig($key, $value)
    {
        if (! is_object($value) || ! $value instanceof ConfigurableService) {
            $value = new ConfigurationService(array(ConfigurationService::OPTION_CONFIG => $value));
        }
        $value->setHeader($this->getConfigHeader($key));
        $this->registerService($this->getId().'/'.$key, $value);
        return true;
    }