FluidTYPO3\Vhs\ViewHelpers\Once\SessionViewHelper::storeIdentifier PHP Method

    protected function storeIdentifier()
    {
        $identifier = $this->getIdentifier();
        $index = get_class($this);
        if (false === is_array($_SESSION[$index])) {
            $_SESSION[$index] = [];
        }
        $_SESSION[$index][$identifier] = time();
    }