Granada\ORM::get_config PHP Method

    public static function get_config($key = null, $connection_name = self::DEFAULT_CONNECTION)
    {
        if ($key) {
            return self::$_config[$connection_name][$key];
        } else {
            return self::$_config[$connection_name];
        }
    }

 public function testLoggerCallback()
 {
     ORM::configure('logger', function ($log_string) {
         return $log_string;
     });
     $function = ORM::get_config('logger');
     $this->assertTrue(is_callable($function));
     $log_string = "UPDATE `widget` SET `added` = NOW() WHERE `id` = '1'";
     $this->assertEquals($log_string, $function($log_string));
     ORM::configure('logger', null);
 }