code: def test_validate_dataset():
      d = {"data": {"values": [{}]}, "mark": {"type": "point"}}
  
      chart = alt.Chart.from_dict(d)
      jsn = chart.to_json()
  
      assert jsn
  
imports: import io
  import json
  import operator
  import os
  import pathlib
  import tempfile
  import jsonschema
  import pytest
  import pandas
  import altair.vegalite.v5
label_desc: Use image node_id 43 for calling a global function with example usage: test_validate_dataset() without return types