How to assign a specific ID for a radio buttons in ipywidgets

Question

I'm using ipywidgets library to create a radio buttons, for example:

   option_search = widgets.RadioButtons(
        options=parameter,
        disabled=False,
    )

I need to assign a specific ID name "test" for this instance to apply my css code : I've tried some solutions but they are all not worked:

 option_search.add_class("test")

or

option_search.layout = widgets.Layout(id="test")

What should I do with this problem ? Thanks a lot