code: def test_icons() -> None:
      import bokeh.sampledata.browsers as bsb
  
      assert isinstance(bsb.icons, dict)
  
      # check detail for package data
      assert set(bsb.icons.keys()).issubset(
          {"Chrome", "Firefox", "Safari", "Opera", "IE"}
      )
  
imports: from __future__ import annotations
  import pytest
  import pandas
  from tests.support.util.api import verify_all
label_desc: Use image node_id 2 for calling a global function with example usage: test_icons() without return types