def METHOD_NAME(source_tree):
    # type: (SourceTree) -> None
    source_tree.assert_sources(
        pex_args=["-M", "top_level_package_classic.sub.foo"],
        expected_sources=[
            "top_level_package_classic/",
            "top_level_package_classic/__init__.py",
            "top_level_package_classic/sub/",
            "top_level_package_classic/sub/__init__.py",
            "top_level_package_classic/sub/foo.py",
        ],
    )