@Override
    public String toString() {
        return "CardinalityEstimatorConfig{"
                + "name='" + name + '\''
                + ", backupCount=" + backupCount
                + ", asyncBackupCount=" + asyncBackupCount
                + ", splitBrainProtectionName=" + splitBrainProtectionName
                + ", mergePolicyConfig=" + mergePolicyConfig + '}';
    }
@Test
    public void testToString() {
        assertContains(config.toString(), "CardinalityEstimatorConfig");
    }