code: def test_entrypoint_exists():
      assert "notebook" in alt.renderers.names()
      assert "notebook" in alt_vg.renderers.names()
  
imports: import altair
  import altair.vega
  from vega import vega, vegalite
label_desc: Use image node_id 1 for calling a global function with example usage: test_entrypoint_exists() without return types