code: def test_pos_label(precalculated_rf_multiclass_explainer):
      precalculated_rf_multiclass_explainer.pos_label = 1
      precalculated_rf_multiclass_explainer.pos_label = "Southampton"
      assert isinstance(
          precalculated_rf_multiclass_explainer.pos_label, int
      )
      assert isinstance(
          precalculated_rf_multiclass_explainer.pos_label_str, str
      )
      assert precalculated_rf_multiclass_explainer.pos_label == 1
      assert (
          precalculated_rf_multiclass_explainer.pos_label_str
          == "Southampton"
      )
  
imports: import pytest
  import pandas
  import numpy
  import plotly.graph_objects
label_desc: Use image node_id 28 for calling a global function with example usage: test_pos_label(precalculated_rf_multiclass_explainer) without return types