CRestProvider::OnAppEvent

static function OnAppEvent($arParams, $arHandler)
{
	$arEventFields = $arParams[0];
	if($arEventFields['APP_ID'] == $arHandler['APP_ID'] || $arEventFields['APP_ID'] == $arHandler['APP_CODE'])
	{
		$arEventFields["LANGUAGE_ID"] = CRestUtil::getLanguage();

		unset($arEventFields['APP_ID']);
		return $arEventFields;
	}
	else
	{
		throw new Exception('Wrong app!');
	}
}