code: def test_LayoutDOM_css_classes() -> None:
      m = LayoutDOM()
      assert m.css_classes == []
      m.css_classes = ["foo"]
      assert m.css_classes == ["foo"]
      m.css_classes = ("bar",)
      assert m.css_classes == ["bar"]
  
file_path: bokeh/tests/unit/bokeh/models/test_layouts__models.py
imports: from __future__ import annotations
  import pytest
  from bokeh.models import ColumnDataSource
  from bokeh.models.ui import Tooltip
  from bokeh.plotting import figure
  from bokeh.models.layouts import Row, Column, LayoutDOM, TabPanel
label_desc: Use image node_id 6 for calling a global function with example usage: test_LayoutDOM_css_classes() without return types