code: def prepare_data(self) -> None:
      MNIST("./data", download=True)
  
imports: import sys
  import torch
  import torchvision.transforms
  from torch.nn import functional
  import torch.nn
  from torchmetrics import Accuracy
  from torchvision.datasets.mnist import MNIST
  from pytorch_lightning import LightningModule
  from clearml import Task
label_desc: Use image node_id 7 for calling the ImageClassifier obj's underlying member method code with example usage: obj.prepare_data() without return types