code: def __snapshot_ls(self):
      self.snapshot_command.parse(["snapshot", "ls"])
      snapshot_ls_result = self.snapshot_command.execute()
      return snapshot_ls_result
  
imports: from __future__ import print_function
  import os
  import tempfile
  import platform
  import timeout_decorator
  from io import open
  from datmo.config import Config
  from datmo.cli.driver.helper import Helper
  from datmo.cli.command.environment import EnvironmentCommand
  from datmo.cli.command.project import ProjectCommand
  from datmo.cli.command.snapshot import SnapshotCommand
  from datmo.cli.command.run import RunCommand
  from datmo.core.util.misc_functions import pytest_docker_environment_failed_instantiation
label_desc: Use image node_id 8 for calling the TestFlow obj's underlying member method code with example usage: obj.__snapshot_ls() and returns: snapshot_ls_result