Is this supposed to be `getattr`? I don't think `setattr` returns anything. https://github.com/PyTorchLightning/pytorch-lightning/blob/ca9b25db80f08a3b9a3c448048949ec1adb845ba/pytorch_lightning/trainer/connectors/data_connector.py#L117 cc @justusschock @awaelchli @ninginthecloud
