@Test
  public void testLazyUnionNestedExceedLimit() throws Throwable {
    checkExtendedLimitExceeded(EXTENDED_LEVEL_THRESHOLD, ObjectInspector.Category.UNION);
  }
Test the LazyUnion class with multiple levels of nesting
serde/src/test/org/apache/hadoop/hive/serde2/lazy/TestLazyArrayMapStruct.java