class_docstr: Tests for checking loading has backwards compatiblity
docstr: Tests for backwards compatible fx module
docstr_tok: ["Tests","for","backwards","compatible","fx","module"]
code: def test_load_bc_packages_fx_module(self):
      """Tests for backwards compatible fx module"""
      importer3 = PackageImporter(
          f"{packaging_directory}/test_fx_module.pt"
      )
      loaded3 = importer3.load_pickle("fx_module", "fx_module.pkl")
  
file_path: pytorch/test/package/test_load_bc_packages.py
imports: from pathlib import Path
  from unittest import skipIf
  from torch.package import PackageImporter
  from torch.testing._internal.common_utils import IS_FBCODE, IS_SANDCASTLE, run_tests
label_desc: Use image node_id 3 for calling the TestLoadBCPackages obj's underlying member method code with example usage: obj.test_load_bc_packages_fx_module() without return types