code: def test_deepcopy(self):
      categorical_column = fc_lib.categorical_column_with_identity(
          key="aaa", num_buckets=3
      )
      embedding_column = tpu_fc.embedding_column_v2(
          categorical_column, dimension=2
      )
      embedding_column_copy = copy.deepcopy(embedding_column)
      self.assertEqual(
          embedding_column.dimension, embedding_column_copy.dimension
      )
      self.assertEqual(
          embedding_column._max_sequence_length,
          embedding_column_copy._max_sequence_length,
      )
  
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 EmbeddingColumnTestV2 obj's underlying member method code with example usage: obj.test_deepcopy() without return types