private Callback<Void> securityProcessRequestCallback() {
      return buildCallback(frontendMetrics.listSecurityProcessRequestMetrics,
          securityCheckResult -> securityService.postProcessRequest(restRequest, securityPostProcessRequestCallback()),
          uri, LOGGER, finalCallback);
    }
After {@link SecurityService#processRequest} finishes, call {@link SecurityService#postProcessRequest} to perform
any remaining security checks.
@return a {@link Callback} to be used with {@link SecurityService#processRequest}.
ambry-frontend/src/main/java/com/github/ambry/frontend/NamedBlobListHandler.java