code: def _get_kfp_pipeline_id(self, pipeline_name: str) -> Optional[str]:
      return self._client.get_pipeline_id(pipeline_name)
  
imports: import codecs
  import locale
  import os
  import subprocess
  import sys
  from typing import Optional
  import absl
  from google.cloud import storage
  import kfp
  import kfp_server_api
  import tensorflow
  from tfx.dsl.io import fileio
  from tfx.tools.cli import labels
  from tfx.tools.cli import pip_utils
  from tfx.tools.cli.e2e import test_utils
  from tfx.utils import retry
  from tfx.utils import test_case_utils
label_desc: Use image node_id 7 for calling the CliKubeflowEndToEndTest obj's underlying member method code with example usage: obj._get_kfp_pipeline_id(pipeline_name) and returns: self