public function findByID($aid, $associationsFilter = null)
    {
        $xmlQuery = $this->associationsApiService->getAssociation($aid, $associationsFilter);

        $association = new Association();

        $mapper = new \RGU\Dvoconnector\Mapper\Association($xmlQuery);
        $mapper->mapToAbstractEntity($association);

        return $this->completeEntity($association);
    }