code: def test_invalid_dims(self):
      lbm = LinearBiasMitigator()
      with pytest.raises(ConfigurationError):
          lbm(torch.zeros(2), torch.zeros(2))
      with pytest.raises(ConfigurationError):
          lbm(torch.zeros(2), torch.zeros((2, 2)))
      with pytest.raises(ConfigurationError):
          lbm(torch.zeros((2, 3)), torch.zeros(2))
  
imports: import torch
  from torch import allclose
  import pytest
  import json
  from allennlp.common.checks import ConfigurationError
  from allennlp.common.testing import AllenNlpTestCase, multi_device
  from allennlp.fairness.bias_mitigators import LinearBiasMitigator, HardBiasMitigator, INLPBiasMitigator, OSCaRBiasMitigator
  from allennlp.fairness.bias_direction import TwoMeansBiasDirection
label_desc: Use image node_id 2 for calling the LinearBiasMitigatorTest obj's underlying member method code with example usage: obj.test_invalid_dims() without return types