code: def test_random_token_mask(self):
      self._test_random_token_mask_parameters(device="cpu")
  
imports: import copy
  import unittest
  import torch
  import torch.nn
  from lightly.models import utils
  from lightly.models.utils import _no_grad_trunc_normal, activate_requires_grad, batch_shuffle, batch_unshuffle, deactivate_requires_grad, nearest_neighbors, normalize_weight, update_momentum
label_desc: Use image node_id 17 for calling the TestModelUtils obj's underlying member method code with example usage: obj.test_random_token_mask() without return types