code: def test_kaleido_engine_to_image_returns_bytes():
      result = pio.to_image(
          fig, format="svg", engine="kaleido", validate=False
      )
      assert result.startswith(b"<svg")
  
file_path: plotly.py/packages/python/plotly/plotly/tests/test_optional/test_kaleido/test_kaleido.py
imports: import plotly.io
  import plotly.io.kaleido
  from contextlib import contextmanager
  from io import BytesIO
  from pathlib import Path
  from unittest.mock import Mock
label_desc: Use image node_id 3 for calling a global function with example usage: test_kaleido_engine_to_image_returns_bytes() without return types