code: def predict_step(self, batch, batch_idx):
      x, _ = batch
      return self.forward(x)
  
imports: import operator
  import torch
  import torch.nn.functional
  from lightning.pytorch import LightningModule
  from lightning_utilities.core.imports import compare_version
  from torch import nn
  from torchmetrics import Accuracy, MeanSquaredError
label_desc: Use image node_id 7 for calling the ClassificationModel obj's underlying member method code with example usage: obj.predict_step(batch, batch_idx) and returns: self