Using torchvision models in Lightning

I’m just getting started with pytorch lightning. Is there a way to use a precreated torchvision model in lightning? All of the examples that I see build a new model which inherits from LightningModule such as at How to organize PyTorch into Lightning — PyTorch Lightning 1.1.8 documentation ( but I have a model, net = models.segmentation.fcn_resnet50(pretrained=False, num_classes=91) which I would like to make a lightning module.