docs: def render_stop_display(step: 'projects.ProjectStep', message: str):
      """Renders a stop action to the Cauldron display."""
      stack = render_stack.get_formatted_stack_frame(
          project=step.project,
          error_stack=False
      )
  
      try:
          names = [frame['filename'] for frame in stack]
          index = names.index(os.path.realpath(__file__))
          frame = stack[index - 1]
      except Exception:
          frame = {}
  
      stop_message = (
          '{}'.format(message)
          if message else
          'This step was explicitly stopped prior to its completion'
      )
  
      dom = templating.render_template(
          'step-stop.html',
          message=stop_message,
          frame=frame
      )
      step.report.append_body(dom)