@Test(expected = ConstraintViolationException.class)
 public void testSetIssueNumber_Null() throws Exception {
   Validator.validate(entity, CLASS.getMethod("setIssueNumber", Long.class), new Object[] {null});
 }
 @Test(expected = ConstraintViolationException.class)
 public void testCopyConstructor_Null() throws Exception {
   Validator.validate(CLASS.getConstructor(AbstractBD.class), new Object[] {null});
 }