class_docstr: Helper methods for Beam Handler.
class_docstr_tok: ["Helper","methods","for","Beam","Handler","."]
docstr: Lists all runs of a pipeline.
docstr_tok: ["Lists","all","runs","of","a","pipeline","."]
code: def list_runs(self) -> None:
      """Lists all runs of a pipeline."""
      click.echo(
          "Not supported for {} orchestrator.".format(
              self.flags_dict[labels.ENGINE_FLAG]
          )
      )
  
imports: import json
  import sys
  from typing import Any, Dict
  import click
  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 beam_dag_runner_patcher
  from tfx.tools.cli.handler import dag_runner_patcher
  from tfx.utils import io_utils
label_desc: Use image node_id 10 for calling the BeamHandler obj's underlying member method code with example usage: obj.list_runs() without return types