code: def test_rfreg_plot_trees(
      precalculated_rf_regression_explainer, test_names
  ):
      fig = precalculated_rf_regression_explainer.plot_trees(index=0)
      assert isinstance(fig, go.Figure)
  
      fig = precalculated_rf_regression_explainer.plot_trees(
          index=test_names[0]
      )
      assert isinstance(fig, go.Figure)
  
      fig = precalculated_rf_regression_explainer.plot_trees(
          index=test_names[0], highlight_tree=0
      )
      assert isinstance(fig, go.Figure)
  
file_path: explainerdashboard/tests/test_randomforest_explainer.py
imports: import pandas
  import plotly.graph_objects
  import dtreeviz
label_desc: Use image node_id 8 for calling a global function with example usage: test_rfreg_plot_trees(precalculated_rf_regression_explainer, test_names) without return types