LazyRecord\ConfigLoader::load PHP Method

    public function load($arg, $force = false)
    {
        // should we load config file force ?
        if ($force !== true && $this->loaded === true) {
            throw new Exception('Can not load config. Config is already loaded.');
        }
        if ($arg === null || is_bool($arg)) {
            $arg = $this->symbolFilename;
        }
        if (is_string($arg) && file_exists($arg) || $arg === true) {
            $this->loadFromFile($arg);
        } elseif (is_array($arg)) {
            $this->config = self::preprocessConfig($arg);
        } else {
            throw new Exception('unknown config format.');
        }
        // XXX: validate config structure if we are migrating to new major version with incompatible changes
        /*
        if (!isset($this->config['data_source'])) {
            throw new Exception('data_source is missing, please update your config file.');
        }
        */
        $this->loaded = true;
    }