code: def test_jupyterlab(self):
      self.__set_variables()
      test_mem_limit = "4g"
      # test single ports option before command
      self.workspace_command.parse(
          [
              "jupyterlab",
              "--gpu",
              "--environment-paths",
              self.env_def_path,
              "--mem-limit",
              test_mem_limit,
          ]
      )
  
      # test for desired side effects
      assert self.workspace_command.args.gpu == True
      assert self.workspace_command.args.environment_paths == [
          self.env_def_path
      ]
      assert self.workspace_command.args.mem_limit == test_mem_limit
  
      # test multiple ports option before command
      self.workspace_command.parse(["jupyterlab"])
  
      assert self.workspace_command.args.gpu == False
  
      @timeout_decorator.timeout(10, use_signals=False)
      def timed_run(timed_run_result):
          if self.workspace_command.execute():
              return timed_run_result
  
      timed_run_result = False
      try:
          timed_run_result = timed_run(timed_run_result)
      except timeout_decorator.timeout_decorator.TimeoutError:
          timed_run_result = True
  
      assert timed_run_result
  
      # Stop all running datmo task to not have any containers
      self.run_command.parse(["stop", "--all"])
      self.run_command.execute()
  
      # creating and passing environment id
      random_text = str(uuid.uuid1())
      with open(self.env_def_path, "wb") as f:
          f.write(
              to_bytes(
                  str("FROM datmo/python-base:cpu-py27%s" % os.linesep)
              )
          )
          f.write(to_bytes(str("RUN echo " + random_text)))
  
      self.environment_command.parse(
          [
              "environment",
              "create",
              "--name",
              "test",
              "--description",
              "test description",
          ]
      )
      result = self.environment_command.execute()
  
      # test notebook command
      self.workspace_command.parse(
          ["jupyterlab", "--environment-id", result.id]
      )
  
      @timeout_decorator.timeout(10, use_signals=False)
      def timed_run(timed_run_result):
          if self.workspace_command.execute():
              return timed_run_result
  
      timed_run_result = False
      try:
          timed_run_result = timed_run(timed_run_result)
      except timeout_decorator.timeout_decorator.TimeoutError:
          timed_run_result = True
  
      assert timed_run_result
  
      # Stop all running datmo task
      self.run_command.parse(["stop", "--all"])
      self.run_command.execute()
  
imports: from __future__ import division
  from __future__ import print_function
  from __future__ import unicode_literals
  import os
  import uuid
  import tempfile
  import platform
  import timeout_decorator
  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.workspace import WorkspaceCommand
  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 5 for calling the TestWorkspace obj's underlying member method code with example usage: obj.test_jupyterlab() and returns: timed_run_result, timed_run_result