Helper::isAjaxRequest

static function isAjaxRequest()
{
	if (self::$isAjaxRequest === null)
	{
		self::$isAjaxRequest =
			(isset($_SERVER["HTTP_BX_ACTION_TYPE"]) && $_SERVER["HTTP_BX_ACTION_TYPE"] === "get_dynamic") ||
			(defined("actionType") && constant("actionType") === "get_dynamic");
	}

	return self::$isAjaxRequest;
}