code: def test_unsqueeze(self):
      class UnsqueezeModule(torch.nn.Module):
          def __init__(self, dim):
              super().__init__()
              self.dim = dim
  
          def forward(self, arg):
              return arg.unsqueeze(self.dim)
  
      self.check(UnsqueezeModule(-2), torch.randn(4, 2, 2))
      self.check(UnsqueezeModule(-1), torch.randn(4, 2, 2))
      self.check(UnsqueezeModule(0), torch.randn(4, 2, 2))
      self.check(UnsqueezeModule(1), torch.randn(4, 2, 2))
      self.check(UnsqueezeModule(2), torch.randn(4, 2, 2))
  
imports: import os
  import ctypes
  import torch
  import unittest
  from typing import Tuple
  from torch.backends._nnapi.prepare import convert_model_to_nnapi
  from torch.testing._internal.common_quantized import supported_qengines
  from torch.testing._internal.common_utils import TestCase, run_tests
label_desc: Use image node_id 9 for calling the TestNNAPI obj's underlying member method code with example usage: obj.test_unsqueeze() and returns: arg