code: def training_step(self, batch, batch_idx):
      return self.step(batch[0])
  
imports: import warnings
  from lightning.pytorch import Trainer
  from lightning.pytorch.demos.boring_classes import BoringModel
label_desc: Use image node_id 1 for calling the TestModel obj's underlying member method code with example usage: obj.training_step(batch, batch_idx) and returns: self