code: def test_conversion():
      # Example usage
      messages = [
          {
              "role": "user",
              "content": "How does the weather look today?",
          },
          {
              "role": "assistant",
              "content": "The weather is sunny and warm.",
          },
          {"role": "user", "content": "What about tomorrow?"},
          {
              "role": "assistant",
              "content": "It's expected to rain tomorrow.",
          },
      ]
  
      converted_structure = convert_messages_to_structure(messages)
      print(converted_structure)
  
label_desc: Use image node_id 1 for calling a global function with example usage: test_conversion() without return types