code: def test_MissingValues__no_headers():
      state = __prepare_test_data()
      viz = MissingValues(headers=False)
      viz._internal_render = MagicMock()
      viz.render_markdown = MagicMock()
  
      viz.render(state)
  
      assert viz._internal_render.call_count == 2
      assert viz.render_markdown.call_count == 0
  
file_path: autogluon/eda/tests/unittests/visualization/test_missing.py
imports: from unittest.mock import MagicMock, call
  import missingno
  import numpy
  import pandas
  import pytest
  from autogluon.eda import AnalysisState
  from autogluon.eda.visualization import MissingValues
label_desc: Use image node_id 2 for calling a global function with example usage: test_MissingValues__no_headers() without return types