code: def test_mixed() -> None:
      mixed = dict(foo="stuff", baz=22.2)
      o = DummyOpts(mixed)
      assert o.foo == "stuff"
      assert o.bar is None
      assert mixed == {"baz": 22.2}
  
file_path: bokeh/tests/unit/bokeh/util/test_options.py
imports: from __future__ import annotations
  import pytest
  from bokeh.core.properties import Int, Nullable, String
  from bokeh.util.options import Options
label_desc: Use image node_id 4 for calling a global function with example usage: test_mixed() without return types