code: def testGetSliceKeyType(self):
      test_cases = [
          (slicer.SliceKeyType, "overall", ()),
          (slicer.SliceKeyType, "one bytes feature", (("a", "5"),)),
          (slicer.SliceKeyType, "one int64 feature", (("a", 1),)),
          (slicer.SliceKeyType, "mixed", (("a", 1), ("b", "f"))),
          (
              slicer.SliceKeyType,
              "more",
              (("a", 1), ("b", "f"), ("c", "cars")),
          ),
          (
              slicer.SliceKeyType,
              "unicode",
              (("a", b"\xe4\xb8\xad\xe6\x96\x87"),),
          ),
          (slicer.CrossSliceKeyType, "CrossSlice overall", ((), ())),
          (
              slicer.CrossSliceKeyType,
              "CrossSlice one slice key baseline",
              ((("a", "5"),), ()),
          ),
          (
              slicer.CrossSliceKeyType,
              "CrossSlice one slice key comparison",
              ((), (("a", 1),)),
          ),
          (
              slicer.CrossSliceKeyType,
              "CrossSlice two simple slice key",
              ((("a", 1),), (("b", "f"),)),
          ),
          (
              slicer.CrossSliceKeyType,
              "CrossSlice two multiple slice key",
              (
                  (("a", 1), ("b", "f"), ("c", "11")),
                  (("a2", 1), ("b", "m"), ("c", "11")),
              ),
          ),
      ]  # pyformat: disable
      for expected_result, name, slice_key in test_cases:
          self.assertEqual(
              expected_result,
              slicer.get_slice_key_type(slice_key),
              msg=name,
          )
  
      unrecognized_test_cases = [
          ("Unrecognized 1: ", ("a")),
          ("Unrecognized 2: ", ("a",)),
          ("Unrecognized 3: ", ("a", 1)),
          ("Unrecognized 4: ", (("a"))),
          ("Unrecognized 5: ", (("a",))),
          ("Unrecognized 6: ", ((), (), ())),
          ("Unrecognized 7: ", ((("a", 1),), (("b", 1),), (("c", 1),))),
          ("Unrecognized 8: ", ((("a", 1),), ("b", 1))),
          ("Unrecognized 9: ", (("a", 1), (("b", 1),))),
      ]  # pyformat: disable
      for name, slice_key in unrecognized_test_cases:
          with self.assertRaises(TypeError, msg=name + str(slice_key)):
              slicer.get_slice_key_type(slice_key)
  
imports: from absl.testing import parameterized
  import apache_beam
  from apache_beam.testing import util
  import numpy
  import six
  import tensorflow
  from tensorflow_model_analysis import constants
  from tensorflow_model_analysis.api import types
  from tensorflow_model_analysis.eval_saved_model import testutil
  from tensorflow_model_analysis.extractors import slice_key_extractor
  from tensorflow_model_analysis.post_export_metrics import metric_keys
  from tensorflow_model_analysis.proto import config_pb2
  from tensorflow_model_analysis.proto import metrics_for_slice_pb2
  from tensorflow_model_analysis.slicer import slicer_lib
  from google.protobuf import text_format
label_desc: Use image node_id 16 for calling the SlicerTest obj's underlying member method code with example usage: obj.testGetSliceKeyType() without return types