code: def configure_optimizers(self) -> None:
      # configure_optimizers must be implemented for PyTorch Lightning. Returning None
      # means that no optimization is performed.
      pass
  
file_path: lightly/lightly/utils/benchmarking/knn_classifier.py
imports: from typing import Tuple, Union
  import torch
  import torch.nn.functional
  from pytorch_lightning import LightningModule
  from torch import Tensor
  from torch.nn import Module
  from lightly.utils.benchmarking import knn_predict
  from lightly.utils.benchmarking.topk import mean_topk_accuracy
label_desc: Use image node_id 6 for calling the KNNClassifier obj's underlying member method code with example usage: obj.configure_optimizers() without return types