code: def setUp(self):
      d1_len = 100
      d2_len = 1000
      d1 = SSLTestDataset(labeled=True, length=d1_len)
      d2 = SSLTestDataset(labeled=False, length=d2_len)
      dataset = ConcatDataset([d1, d2])
  
      print(len(dataset))
  
      self.al_dataset = ActiveLearningDataset(dataset)
      self.al_dataset.label(list(range(d1_len)))
  
imports: import unittest
  from argparse import Namespace
  import torch
  from baal.active import ActiveLearningDataset
  from pytorch_lightning import Trainer
  from baal.utils.ssl_module import SSLModule
  from torch import nn
  from torch.utils.data import ConcatDataset
  from tests.utils.ssl_iterator_test import SSLTestDataset
label_desc: Use image node_id 1 for calling the SSLModuleTest obj's underlying member method code with example usage: obj.setUp() without return types