$paginator = $this->items()->where('position', '=', null)->paginate(15);
$paginator->getCollection()->transform(function ($value) {
// Your code here
return $value;
});
$paginator = tap($this->items()->where('position', '=', null)->paginate(15),function($paginatedInstance){
return $paginatedInstance->getCollection()->transform(function ($value) {
return $value;
});
});