def METHOD_NAME(
    self, temp_subvolumes, unshare, mount_dir, label: str
) -> None:
    self._assert_filesystem_label(unshare, mount_dir, label)
    subvol = temp_subvolumes.create("subvol")
    subprocess.check_call(
        nsenter_as_root(
            unshare,
            "rsync",
            "--archive",
            "--hard-links",
            "--sparse",
            "--xattrs",
            "--acls",
            f"{mount_dir}/",
            subvol.path(),
        )
    )
    with tempfile.NamedTemporaryFile() as temp_sendstream:
        subvol.mark_readonly_and_write_sendstream_to_file(temp_sendstream)
        original_render = self._render_sendstream_path(
            self._sibling_path("create_ops-original.sendstream")
        )
        self._assert_ignore_original_extents(original_render)
        # lost+found is an ext3 thing
        original_render[1]["lost+found"] = ["(Dir m700)", {}]
        self._assert_meta_valid_and_sendstreams_equal(
            original_render,
            self._render_sendstream_path(Path(temp_sendstream.name)),
        )