code: def test(self, verify_fn):
      def build_dataset(num_elements, unique_elem_range):
          return (
              dataset_ops.Dataset.range(num_elements)
              .map(lambda x: x % unique_elem_range)
              .unique()
          )
  
      verify_fn(self, lambda: build_dataset(200, 100), num_outputs=100)
  
imports: from absl.testing import parameterized
  from tensorflow.python.data.kernel_tests import checkpoint_test_base
  from tensorflow.python.data.kernel_tests import test_base
  from tensorflow.python.data.ops import dataset_ops
  from tensorflow.python.framework import combinations
  from tensorflow.python.framework import dtypes
  from tensorflow.python.platform import test
  from tensorflow.python.util import compat
label_desc: Use image node_id 1 for calling the UniqueCheckpointTest obj's underlying member method code with example usage: obj.test(verify_fn) and returns: dataset_ops