| Dropped support for GsonBuilder.registerTypeHierarchyAdapter+InstanceCreator | |
| Relax registerTypeHierarchyAdapter order | |
| Gson 2.0 failed if you registered Manager then Employee would fail | |
| Gson 2.1 it isn't a problem | |
| com.google.gson.functional.TypeHierarchyAdapterTest#testRegisterSubTypeFirstNotAllowed |