code: def __init__(self, client):
      pass
  
imports: import os
  import random
  from unittest import mock
  import apache_beam
  from apache_beam.testing import util
  import prestodb
  import tensorflow
  from tfx.dsl.io import fileio
  from tfx.examples.custom_components.presto_example_gen.presto_component import executor
  from tfx.examples.custom_components.presto_example_gen.proto import presto_config_pb2
  from tfx.proto import example_gen_pb2
  from tfx.types import artifact_utils
  from tfx.types import standard_artifacts
  from tfx.utils import proto_utils
label_desc: Use image node_id 1 to create a new _MockReadPrestoDoFn2 object from inherited base classes: beam with example: obj = _MockReadPrestoDoFn2(client)