code: def test_json_to_sunburst(self):
      Analyzer.json_to_sunburst(evaluate_result)
      Analyzer.json_to_sunburst(evaluate_result, "f1")
      self.assertEqual((None, None), Analyzer.json_to_sunburst({}))
  
imports: import unittest
  from textflint.report.analyzer import Analyzer
label_desc: Use image node_id 2 for calling the TestAnalyzer obj's underlying member method code with example usage: obj.test_json_to_sunburst() without return types