code: public static AttachmentMessageBuilder getReusableAudioAttachment(String attachmentId) {
  		AttachmentPayload payload = new AttachmentPayload();
  		payload.setAttachmentId(attachmentId);
  		return new AttachmentMessageBuilder(AttachmentType.AUDIO, payload);
  	}
docs: Get the reusable audio attachment
  
  @param attachmentId
  the attachment id generated by the upload api
  @return a builder for the response.
  @see <a href=
  "https://developers.facebook.com/docs/messenger-platform/send-api-reference/audio-attachment"
  > Facebook's Messenger Platform Audio Attachment Documentation</a>