code: 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);
      }
docs: Display a listing of the child resource.
  
  @return \Illuminate\Http\Response