gistfile1.txt

    public function transform($conncetorIn, $connectorOut, AbstractTransformer $transformer, $fieldMap = '*', $resourceClass = Item::class)
    {
        $resource = new $resourceClass($data, '', $fieldMap);
        $transformed = $transformer->transform($conncetorIn->dataForTransformer());
        $connectorOut->dataFromTransformer($transformed);
    }