code: def test_toplevel_underscore_kwarg(self):
      fig = go.Figure(
          data=[{"type": "bar"}],
          layout_title_text="Hello, Figure title!",
      )
  
      self.assertEqual(fig.layout.title.text, "Hello, Figure title!")
  
imports: import plotly.graph_objects
  from plotly.subplots import make_subplots
  from plotly.tests.utils import TestCaseNoTemplate
  import pytest
label_desc: Use image node_id 10 for calling the FigureTest obj's underlying member method code with example usage: obj.test_toplevel_underscore_kwarg() without return types