code: def get_lib(self):
      lib = Library(self.test_ns, "FRAGMENT")
      self.lib = lib
      return lib
  
imports: import contextlib
  import warnings
  import numpy
  import torch
  from torch.library import Library
  from torch.testing._internal.common_utils import instantiate_parametrized_tests, parametrize, run_tests, TestCase
label_desc: Use image node_id 3 for calling the TestAutogradFallback obj's underlying member method code with example usage: obj.get_lib() and returns: lib