class Aws::S3::MultipartUploadPart

def extract_multipart_upload_id(args, options)
  value = args[2] || options.delete(:multipart_upload_id)
  case value
  when String then value
  when nil then raise ArgumentError, "missing required option :multipart_upload_id"
  else
    msg = "expected :multipart_upload_id to be a String, got #{value.class}"
    raise ArgumentError, msg
  end
end