code: def test_plot_pi_metric_names_all(exp):
      """Test if all the metrics are plotted if `metric_names='all'`."""
      axes = plot_permutation_importance(
          exp=exp, metric_names="all"
      ).ravel()
      assert len(axes) == len(exp.data["metric_names"])
  
      titles = [ax.get_title() for ax in axes]
      assert titles == exp.data["metric_names"]
  
imports: import re
  from copy import deepcopy
  import matplotlib.pyplot
  import numpy
  import pytest
  from pytest_lazyfixture import lazy_fixture
  from sklearn.metrics import accuracy_score, f1_score, max_error
  from alibi.api.defaults import DEFAULT_DATA_PERMUTATION_IMPORTANCE, DEFAULT_META_PERMUTATION_IMPORTANCE
  from alibi.api.interfaces import Explanation
  from alibi.explainers import PermutationImportance, plot_permutation_importance
label_desc: Use image node_id 19 for calling a global function with example usage: test_plot_pi_metric_names_all(exp) without return types