code: def test_heatmap_missing(compute_backend_df):
      w = dd.data_heatmap(compute_backend_df, missing=True)
      assert isinstance(w, HeatmapWidget)
      assert (
          w.missing is True
      ), "Missing param was not assigned to the widget"
      assert (
          w.missing_data is not None
      ), "`Missing dataframe` is missing"
  
file_path: data-describe/tests/test_data_heatmap.py
imports: import matplotlib
  import pytest
  import plotly
  import data_describe
  from data_describe.core.heatmap import HeatmapWidget
label_desc: Use image node_id 2 for calling a global function with example usage: test_heatmap_missing(compute_backend_df) without return types