code: def __init__(self) -> None:
      super().__init__()
      self.linear = nn.Sequential(nn.Flatten(), nn.Linear(3 * 8 * 8, 3))
      self.online_classifier = OnlineLinearClassifier(
          feature_dim=3, num_classes=5
      )
  
file_path: lightly/tests/utils/benchmarking/test_online_linear_classifier.py
imports: import pytest
  import torch
  from pytorch_lightning import LightningModule, Trainer
  from torch import Tensor, nn
  from torch.optim import SGD
  from torch.utils.data import DataLoader
  from torchvision.datasets import FakeData
  from torchvision.transforms import ToTensor
  from lightly.utils.benchmarking import OnlineLinearClassifier
label_desc: Use image node_id 1 to create a new _DummyModule object from inherited base classes: LightningModule with example: obj = _DummyModule()