code: def tearDown(self):
      self.emulator.stop()
  
file_path: io/tests/test_bigtable/test_read_rows.py
imports: import os
  from .bigtable_emulator import BigtableEmulator
  from tensorflow_io.python.ops.bigtable.bigtable_dataset_ops import BigtableClient
  import tensorflow_io.python.ops.bigtable.bigtable_row_range
  import tensorflow_io.python.ops.bigtable.bigtable_row_set
  import tensorflow
  from tensorflow import test
  import pytest
  import sys
label_desc: Use image node_id 2 for calling the BigtableReadTest obj's underlying member method code with example usage: obj.tearDown() without return types