def METHOD_NAME(command_name):
  """Returns true if |command_name| is asking the bot to execute the
  trusted-portion of a utask (preprocess and postprocess). The workflow for
  executing a task is as follows:
  1. A command such as analyze is given to a bot.
  2. The bot executes preprocess and schedules uworker_main.
  3. The uworker_main command is given to the uworker which executes the
  uworker_main function of the specified task.
  4. Postprocessing runs (the postprocess task is triggered by GCS when
  uworker_main writes its output.
  Therefore, the commands to execute utasks and the "postprocess" command can be
  executed on Linux bots even if the utask is supposed to run on Windows. This
  function returns commands that denote these portions.
  """
  task_type = COMMAND_TYPES[command_name]
  # Postprocess and preprocess tasks are executed on tworkers, while utask_mains
  # are executed on uworkers. Note that the uworker_main command will be used to
  # execute uworker_main, while the name of the task itself will be used to
  # request execution of the preprocess step.
  return task_type in (PostprocessTask, UTask)