private static function loadLibrary()
{
self::$isLibLoaded = true;
require_once GLZ_LIBS_DIR . '/Doctrine/Common/ClassLoader.php';
$classLoader = new \Doctrine\Common\ClassLoader('Doctrine\\Common', GLZ_LIBS_DIR);
$classLoader->register();
$classLoader = new \Doctrine\Common\ClassLoader('Doctrine\\DBAL', GLZ_LIBS_DIR);
$classLoader->register();
}