code: def test_display_issues_show(mock_plt):
      issues = find_label_issues(
          labels, pred_probs, downsample=1, n_jobs=None, batch_size=1000
      )
      display_issues(issues, top=1)
      assert mock_plt.called
  
imports: import numpy
  import random
  import pytest
  from unittest import mock
  import matplotlib.pyplot
  from pathlib import Path
  from cleanlab.internal.multilabel_scorer import softmin
  from cleanlab.internal.segmentation_utils import _check_input, _get_valid_optional_params, _get_summary_optional_params
  from cleanlab.segmentation.filter import find_label_issues
  from cleanlab.segmentation.rank import get_label_quality_scores, issues_from_scores, _get_label_quality_per_image
  from cleanlab.segmentation.summary import display_issues, common_label_issues, filter_by_class, _generate_colormap
label_desc: Use image node_id 19 for calling a global function with example usage: test_display_issues_show(mock_plt) without return types