code: public <T> JsonBuilder registerTypeAdapter(Class<T> clazz, TypeAdapter<T> typeAdapter) {
          typeAdapters.registerTypeAdapter(clazz, typeAdapter);
          return this;
      }
docs: Register a TypeAdapter.
  
  @param <T> Type to adapted-to.
  @param clazz The adapted-to class.
  @param typeAdapter The TypeAdapter instance.
  @return JsonBuilder itself.