Extension::register

static function register($extName)
{
	if (CJSCore::isExtRegistered($extName))
	{
		return true;
	}

	$extension = static::getConfig($extName);
	if ($extension !== null)
	{
		static::registerAssets($extName, $extension);

		return true;
	}
	return CJSCore::isExtRegistered($extName);
}