FluidTYPO3\Flux\View\PreviewView::registerTargetContentAreaInSession PHP Method

    protected function registerTargetContentAreaInSession($contentElementUid, $areaName)
    {
        if ('' === session_id()) {
            session_start();
        }
        $integer = MiscellaneousUtility::generateUniqueIntegerForFluxArea($contentElementUid, $areaName);
        $_SESSION['target' . $integer] = array($contentElementUid, $areaName);
        return $integer;
    }