### Question:
AnnotationUtil { public static ReferentialConstraint getDefaultReferentialConstraint() { return DEFAULT_REFERENTIAL_CONSTRAINT; } protected  AnnotationUtil(); static Table getDefaultTable(); static Column getDefaultColumn(); static SequenceGenerator getDefaultSequenceGenerator(); static TableGenerator getDefaultTableGenerator(); static ReferentialConstraint getDefaultReferentialConstraint();  }### Answer:
@Test public void testGetDefaultReferentialConstraint() throws Exception { assertNotNull(AnnotationUtil.getDefaultReferentialConstraint()); }