code: def test_print_joint():
      for m in [joint_matrix, joint_matrix_2, single_element]:
          util.print_joint_matrix(m, round_places=3)
  
imports: from cleanlab.internal import util
  import numpy
  import pytest
  from cleanlab.internal.label_quality_utils import get_normalized_entropy
  from cleanlab.internal.multilabel_utils import int2onehot, onehot2int
  from cleanlab.internal.util import num_unique_classes, format_labels, get_missing_classes
  from cleanlab.internal.validation import assert_valid_class_labels
label_desc: Use image node_id 2 for calling a global function with example usage: test_print_joint() without return types