DirectAdmin\LetsEncrypt\Lib\Utility\ConfigurableTrait::config PHP Method

    public function config($key = null, $value = null)
    {
        if (!$this->initializedConfig) {
            $this->initializeConfig();
        }
        if ($value == null) {
            return $key == null ? $this->config : $this->config[$key];
        } else {
            $this->config[$key] = $value;
            $this->saveConfig();
        }
    }