code: def _MockSubprocess2(
      cmd, env=None
  ):  # pylint: disable=invalid-name, unused-argument
      click.echo(cmd)
      return 0
  
imports: import json
  import os
  import subprocess
  import sys
  from unittest import mock
  import click
  import tensorflow
  from tfx.dsl.components.base import base_driver
  from tfx.dsl.io import fileio
  from tfx.tools.cli import labels
  from tfx.tools.cli.handler import airflow_handler
  from tfx.utils import io_utils
  from tfx.utils import test_case_utils
label_desc: Use image node_id 2 for calling a global function with example usage: _MockSubprocess2(cmd, env) and returns: int