public function getCombinedConfig($name)
    {
        $config = $this->defaultConfig;
        if (isset($this->config[$name]) && is_array($this->config[$name])) {
            $config = $this->config[$name] + $config;
        } else {
            throw new RuntimeException("Config '$name' doesn't exist, please check your config");
        }

        return $config;
    }