code: def test_int_idx(precalculated_rf_classifier_explainer, test_names):
      assert (
          precalculated_rf_classifier_explainer.get_idx(test_names[0])
          == 0
      )
  
imports: import pytest
  import pandas
  import numpy
  from pandas.api.types import is_categorical_dtype, is_numeric_dtype
  import plotly.graph_objects
  from explainerdashboard import ClassifierExplainer, ExplainerDashboard
  from explainerdashboard.explainer_methods import IndexNotFoundError
label_desc: Use image node_id 4 for calling a global function with example usage: test_int_idx(precalculated_rf_classifier_explainer, test_names) without return types