private Map<String, FeatureUpdate> makeTestFeatureUpdates() {
        return Utils.mkMap(
            Utils.mkEntry("test_feature_1", new FeatureUpdate((short) 2,  FeatureUpdate.UpgradeType.UPGRADE)),
            Utils.mkEntry("test_feature_2", new FeatureUpdate((short) 3,  FeatureUpdate.UpgradeType.SAFE_DOWNGRADE)));
    }
Test that we propagate exceptions encountered when fetching metadata.
clients/src/test/java/org/apache/kafka/clients/admin/KafkaAdminClientTest.java