How to use the fire.decorators.GetMetadata function in fire

Args:
    component: The component to call
    args: Args for calling the component
    component_trace: FireTrace object that contains action trace
    treatment: Type of treatment used. Indicating whether we treat the component
        as a class, a routine, or a callable.
    target: Target in FireTrace element, default is None. If the value is None,
        the component itself will be used as target.
  Returns:
    component: The object that is the result of the callable call.
    remaining_args: The remaining args that haven't been consumed yet.
  """
  if not target:
    target = component
  filename, lineno = inspectutils.GetFileAndLine(component)
  metadata = decorators.GetMetadata(component)
  fn = component.__call__ if treatment == 'callable' else component
  parse = _MakeParseFn(fn, metadata)
  (varargs, kwargs), consumed_args, remaining_args, capacity = parse(args)
  component = fn(*varargs, **kwargs)

  if treatment == 'class':
    action = trace.INSTANTIATED_CLASS
  elif treatment == 'routine':
    action = trace.CALLED_ROUTINE
  else:
    action = trace.CALLED_CALLABLE
  component_trace.AddCalledComponent(
      component, target, consumed_args, filename, lineno, capacity,
      action=action)

  return component, remaining_args

"""Gets the help string for the current component, suitalbe for a help screen.

  Args:
    component: The component to construct the help string for.
    trace: The Fire trace of the command so far. The command executed so far
      can be extracted from this trace.
    verbose: Whether to include private members in the help screen.

  Returns:
    The full help screen as a string.
  """
  # Preprocessing needed to create the sections:
  info = inspectutils.Info(component)
  actions_grouped_by_kind = _GetActionsGroupedByKind(component, verbose=verbose)
  spec = inspectutils.GetFullArgSpec(component)
  metadata = decorators.GetMetadata(component)

  # Sections:
  name_section = _NameSection(component, info, trace=trace, verbose=verbose)
  synopsis_section = _SynopsisSection(
      component, actions_grouped_by_kind, spec, metadata, trace=trace)
  description_section = _DescriptionSection(component, info)
  # TODO(dbieber): Add returns and raises sections for functions.

  if callable(component):
    args_and_flags_sections, notes_sections = _ArgsAndFlagsSections(
        info, spec, metadata)
  else:
    args_and_flags_sections = []
    notes_sections = []
  usage_details_sections = _UsageDetailsSections(component,
                                                 actions_grouped_by_kind)

# Get the command so far:
  if trace:
    command = trace.GetCommand()
    needs_separating_hyphen_hyphen = trace.NeedsSeparatingHyphenHyphen()
  else:
    command = None
    needs_separating_hyphen_hyphen = False

  if not command:
    command = ''

  # Build the continuations for the command:
  continued_command = command

  spec = inspectutils.GetFullArgSpec(component)
  metadata = decorators.GetMetadata(component)

  # Usage for objects.
  actions_grouped_by_kind = _GetActionsGroupedByKind(component, verbose=verbose)
  possible_actions = _GetPossibleActions(actions_grouped_by_kind)

  continuations = []
  if possible_actions:
    continuations.append(_GetPossibleActionsUsageString(possible_actions))

  availability_lines = _UsageAvailabilityLines(actions_grouped_by_kind)

  if callable(component):
    callable_items = _GetCallableUsageItems(spec, metadata)
    if callable_items:
      continuations.append(' '.join(callable_items))
    elif trace: