code: def test_deepcopy(self):
      vocabulary_size = 3
      categorical_column_a = fc_lib.categorical_column_with_identity(
          key="aaa", num_buckets=vocabulary_size
      )
      categorical_column_b = fc_lib.categorical_column_with_identity(
          key="bbb", num_buckets=vocabulary_size
      )
      embedding_dimension = 2
      columns = tpu_fc.shared_embedding_columns_v2(
          [categorical_column_b, categorical_column_a],
          dimension=embedding_dimension,
      )
      columns_copy = copy.deepcopy(columns)
      self.assertEqual(
          [
              column._shared_embedding_collection_name
              for column in columns
          ],
          [
              column._shared_embedding_collection_name
              for column in columns_copy
          ],
      )
  
imports: import copy
  from absl.testing import parameterized
  from tensorflow.python.client import session
  from tensorflow.python.feature_column import feature_column_lib
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import test_util
  from tensorflow.python.ops import init_ops
  from tensorflow.python.ops import lookup_ops
  from tensorflow.python.ops import parsing_ops
  from tensorflow.python.ops import variable_scope
  from tensorflow.python.ops import variables
  from tensorflow.python.platform import test
  from tensorflow.python.tpu import feature_column_v2
  from tensorflow.python.tpu import tpu_function
label_desc: Use image node_id 3 for calling the SharedEmbeddingColumnTestV2 obj's underlying member method code with example usage: obj.test_deepcopy() without return types