public void testJsonString() {
   tester.testJsonString(ClassWithJsonAsStringMapper.INSTANCE);
 }
 public void testSimpleNonStringGetter() {
   tester.testSimpleNonStringGetter(ClassGetterInteger.INSTANCE);
 }
 public void testNullStringGetter() {
   tester.testNullStringGetter(ClassGetterString.INSTANCE);
 }
 public void testSimpleStringGetter() {
   tester.testSimpleStringGetter(ClassGetterString.INSTANCE);
 }