public function childShow(FilterRequest $filters, $id, $idChild, $relation)
    {
        $id = $this->getRealId($id);
        $idChild = $this->getRealId($idChild);
        
        $resource = $this->repository->getChild($id, $relation, $idChild, $filters);
        
        if (! $resource) {
            // return $this->notFound();
        }
        
        return $this->success($resource);
    }