code: def test_valid_chart_w_invalid_map_chart():
      assert not chart_utils.valid_chart(
          "maps",
          map_type="choropleth",
          loc_mode="geojson-id",
          geojson=None,
      )
  
file_path: dtale/tests/dtale/charts/test_utils.py
imports: import mock
  import pytest
  import dtale.charts.utils
  from tests import ExitStack
  from tests.dtale.test_charts import build_col_def
label_desc: Use image node_id 2 for calling a global function with example usage: test_valid_chart_w_invalid_map_chart() without return types