public static boolean isMultipartCompleteUploadRequest(RestRequest restRequest) {
    return restRequest.getRestMethod() == RestMethod.POST && restRequest.getArgs().containsKey(S3_REQUEST)
        && restRequest.getArgs().containsKey(UPLOAD_ID_QUERY_PARAM);
  }
@param restRequest the {@link RestRequest} that contains the request parameters.
@return {@code True} if it is a completion/abortion of multipart uploads.
ambry-frontend/src/main/java/com/github/ambry/frontend/s3/S3BaseHandler.java