def METHOD_NAME():
    item = Item()
    item.xattrs = StableDict()
    assert item.xattrs == StableDict()
    item.xattrs["foo"] = "bar"
    assert item.xattrs["foo"] == "bar"
    item.xattrs["bar"] = "baz"
    assert item.xattrs == StableDict({"foo": "bar", "bar": "baz"})
    assert item.as_dict() == {"xattrs": {"foo": "bar", "bar": "baz"}}