private Callback<Void> securityPostProcessRequestCallback() {
      return buildCallback(frontendMetrics.deleteDatasetsSecurityPostProcessRequestMetrics, securityCheckResult -> {
        deleteDataset();
      }, uri, LOGGER, finalCallback);
    }
After {@link SecurityService#postProcessRequest} finishes, call getDataset to get the {@link Dataset}.
@return a {@link Callback} to be used with {@link SecurityService#postProcessRequest}.
ambry-frontend/src/main/java/com/github/ambry/frontend/DeleteDatasetHandler.java