docs: public void addAttachments(Attachments attachments) {
      Attachments newAttachment = new Attachments();
      newAttachment.setContent(attachments.getContent());
      newAttachment.setType(attachments.getType());
      newAttachment.setFilename(attachments.getFilename());
      newAttachment.setDisposition(attachments.getDisposition());
      newAttachment.setContentId(attachments.getContentId());
      this.attachments = addToList(newAttachment, this.attachments);
    }