gslib/commands/autoclass.py [212:231]:
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      subcommand_args.append(setting_arg)

    if self.gsutil_api.GetApiSelector('gs') != ApiSelector.JSON:
      raise CommandException('\n'.join(
          textwrap.wrap(('The "%s" command can only be with the Cloud Storage '
                         'JSON API.') % self.command_name)))

    # Iterate over bucket args, performing the specified subsubcommand.
    some_matched = False
    url_args = self.args
    if not url_args:
      self.RaiseWrongNumberOfArgumentsException()
    for url_str in url_args:
      # Throws a CommandException if the argument is not a bucket.
      bucket_iter = self.GetBucketUrlIterFromArg(url_str)
      for bucket_listing_ref in bucket_iter:
        if self.gsutil_api.GetApiSelector(
            bucket_listing_ref.storage_url.scheme) != ApiSelector.JSON:
          raise CommandException('\n'.join(
              textwrap.wrap(('The "%s" command can only be used for GCS '
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gslib/commands/rpo.py [194:215]:
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      subcommand_args.append(setting_arg)

    # TODO: Remove this as rpo should work for XML as well.
    if self.gsutil_api.GetApiSelector('gs') != ApiSelector.JSON:
      raise CommandException('\n'.join(
          textwrap.wrap(('The "%s" command can only be with the Cloud Storage '
                         'JSON API.') % self.command_name)))

    # Iterate over bucket args, performing the specified subsubcommand.
    some_matched = False
    url_args = self.args
    if not url_args:
      self.RaiseWrongNumberOfArgumentsException()
    for url_str in url_args:
      # Throws a CommandException if the argument is not a bucket.
      bucket_iter = self.GetBucketUrlIterFromArg(url_str)
      for bucket_listing_ref in bucket_iter:
        # TODO: Make this more general when adding RPO support for the XML API.
        if self.gsutil_api.GetApiSelector(
            bucket_listing_ref.storage_url.scheme) != ApiSelector.JSON:
          raise CommandException('\n'.join(
              textwrap.wrap(('The "%s" command can only be used for GCS '
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