|Content-Disposition: form-data; name="attachment"; filename="resumé.pdf"
      |Content-Type: application/pdf; charset=utf-8
      |
      |Jesse’s Resumé
      |--AaB03x--
      |
      """.trimMargin().replace("\n", "\r\n")
    val body =
      MultipartBody
        .Builder("AaB03x")
        .setType(MultipartBody.FORM)
        .addFormDataPart(
          "attachment",
          "resumé.pdf",

        public OptionalThing<Integer> getLastReturnCode() {
            return OptionalThing.of(200);
        }

        @Override
        public java.util.Map<String, org.dbflute.mail.send.supplement.attachment.SMailReadAttachedData> getSavedAttachmentMap() {
            return java.util.Collections.emptyMap();
        }

        @Override
        public java.util.List<jakarta.mail.Address> getSavedToList() {

        final String name = pi.getName();
        final String encodedName = URLEncoder.encode(name, Constants.UTF_8_CHARSET).replace("+", "%20");
        response.header("Content-Disposition", "attachment; filename=\"" + name + "\"; filename*=utf-8''" + encodedName);
        response.header("Pragma", "no-cache");
        response.header("Cache-Control", "no-cache");