private void processResponseHelper() throws RestServiceException {
      LOGGER.debug("Updated TTL of {}",
          RestUtils.getHeader(restRequest.getArgs(), RestUtils.Headers.BLOB_ID, true));
      restResponseChannel.setHeader(RestUtils.Headers.DATE, new GregorianCalendar().getTime());
      restResponseChannel.setHeader(RestUtils.Headers.CONTENT_LENGTH, 0);
      securityService.processResponse(restRequest, restResponseChannel, null, securityProcessResponseCallback());
    }
Helper method to set the response channel and process response.
@throws RestServiceException
ambry-frontend/src/main/java/com/github/ambry/frontend/TtlUpdateHandler.java