class_docstr: Helper methods for Vertex Handler.
class_docstr_tok: ["Helper","methods","for","Vertex","Handler","."]
code: def _get_pipeline_dir(self, pipeline_name: str) -> str:
      return os.path.join(self._handler_home_dir, pipeline_name)
  
imports: import functools
  import os
  import sys
  import click
  from google.cloud import aiplatform
  from google.cloud.aiplatform import pipeline_jobs
  from tfx.dsl.io import fileio
  from tfx.tools.cli import labels
  from tfx.tools.cli.handler import base_handler
  from tfx.tools.cli.handler import kubeflow_handler
  from tfx.tools.cli.handler import kubeflow_v2_dag_runner_patcher
  from tfx.utils import io_utils
label_desc: Use image node_id 12 for calling the VertexHandler obj's underlying member method code with example usage: obj._get_pipeline_dir(pipeline_name) and returns: os