models/classes/cat/CatService.php
public function getCatSection(AssessmentTestSession $testSession, \tao_models_classes_service_StorageDirectory $compilationDirectory, RouteItem $routeItem = null)
    {
        $routeItem = $routeItem ? $routeItem : $testSession->getRoute()->current();
        $sectionId = $routeItem->getAssessmentSection()->getIdentifier();
        
        if (!isset($this->catSection[$sectionId]) || $this->isInitialCall === true) {

            // No retrieval trial yet.
            $adaptiveSectionMap = $this->getAdaptiveSectionMap($compilationDirectory);


            if (isset($adaptiveSectionMap[$sectionId])) {
                $this->catSection[$sectionId] = $this->getCatEngine($testSession, $compilationDirectory, $routeItem)->restoreSection($adaptiveSectionMap[$sectionId]['section']);
            } else {
                $this->catSection[$sectionId] = false;
            }

        }
        
        return $this->catSection[$sectionId];
    }
public function getCatSection(AssessmentTestSession $testSession, \tao_models_classes_service_StorageDirectory $compilationDirectory, RouteItem $routeItem = null)
    {
        $routeItem = $routeItem ? $routeItem : $testSession->getRoute()->current();
        $sectionId = $routeItem->getAssessmentSection()->getIdentifier();
        
        if (!isset($this->catSection[$sectionId]) || $this->isInitialCall === true) {

            // No retrieval trial yet.
            $adaptiveSectionMap = $this->getAdaptiveSectionMap($compilationDirectory);


            if (isset($adaptiveSectionMap[$sectionId])) {
                $this->catSection[$sectionId] = $this->getCatEngine($testSession, $compilationDirectory, $routeItem)->restoreSection($adaptiveSectionMap[$sectionId]['section']);
            } else {
                $this->catSection[$sectionId] = false;
            }

        }
        
        return $this->catSection[$sectionId];
    }
If it is the initial call, reload cat section from $this->catSection cache

@param AssessmentTestSession $testSession
@param \tao_models_classes_service_StorageDirectory $compilationDirectory
@param RouteItem|null $routeItem
@return mixed