code: def test_smoke_alpha_pos_label(self):
      r0 = _get_labels_for_confusion_matrix(["a", "b"], "b")
      assert np.array_equal(r0, ["a", "b"])
      r1 = _get_labels_for_confusion_matrix(["a", "b"], "a")
      assert np.array_equal(r1, ["b", "a"])
  
imports: import numpy
  import pytest
  import sklearn.metrics
  import fairlearn.metrics
  from fairlearn.metrics._base_metrics import _get_labels_for_confusion_matrix
label_desc: Use image node_id 3 for calling the TestGetLabelsForConfusionMatrix obj's underlying member method code with example usage: obj.test_smoke_alpha_pos_label() without return types