@Override
    public String toString() {
        return "DefaultQueryCacheEventData{"
                + "creationTime=" + creationTime
                + ", eventType=" + eventType
                + ", sequence=" + sequence
                + ", partitionId=" + partitionId
                + ", mapName=" + mapName
                + '}';
    }
@Test
    public void testToString() {
        assertNotNull(queryCacheEventData.toString());
    }