public function validateAdaptiveAssessmentSection(SectionPartCollection $sectionsParts, $ref, $testAdminId)
    {
        $engine = $this->getEngine($ref);
        $adaptSection = $engine->setupSection($testAdminId);
        //todo: remove this checking if tests/{getSectionId}/items will become a part of standard.
        if (method_exists($adaptSection, 'getItemReferences')) {
            $itemReferences = $adaptSection->getItemReferences();
            $dependencies = $sectionsParts->getKeys();

            if ($catDiff = array_diff($dependencies, $itemReferences)) {
                throw new AdaptiveSectionInjectionException('Missed some CAT service items: '. implode(', ', $catDiff), $catDiff);
            }

            if ($packageDiff = array_diff($dependencies, $itemReferences)) {
                throw new AdaptiveSectionInjectionException('Missed some package items: '. implode(', ', $packageDiff), $packageDiff);
            }
        }
    }