Holder holder = new Holder(primitiveHolder);
MapperFactory factory = MappingUtil.getMapperFactory();
factory.registerClassMap(
factory.classMap(NestedPrimitiveHolder.class, PrimitiveWrapperHolder.class)
.field("numbers.shortValue", "shortValue")
.field("numbers.intValue", "intValue")
.field("numbers.longValue", "longValue")
.field("numbers.floatValue", "floatValue")
.field("numbers.doubleValue", "doubleValue")