code: def test_single_array(self):
      self.assertEqual(
          fm.process_or_validate_features("a", num_dimensions=10),
          [("a", dt.Array(10))],
      )
  
file_path: coremltools/coremltools/test/sklearn_tests/test_feature_names.py
imports: import unittest
  import coremltools.models._feature_management
  import coremltools.models.datatypes
  from coremltools._deps import _HAS_SKLEARN
label_desc: Use image node_id 2 for calling the FeatureManagementTests obj's underlying member method code with example usage: obj.test_single_array() without return types