protected int getDiffSize() {
        return brokerConfigDiff.size();
    }
@Test
    public void testChangedKRaftControllerConfig() {
        List<ConfigEntry> desiredControllerConfig = singletonList(new ConfigEntry("controller.quorum.election.timeout.ms", "5000"));
        List<ConfigEntry> currentControllerConfig = singletonList(new ConfigEntry("controller.quorum.election.timeout.ms", "1000"));
        KafkaBrokerConfigurationDiff kcd = new KafkaBrokerConfigurationDiff(Reconciliation.DUMMY_RECONCILIATION, getCurrentConfiguration(currentControllerConfig),
                getDesiredConfiguration(desiredControllerConfig), kafkaVersion, nodeRef);
        assertThat(kcd.getDiffSize(), is(0));
    }