调用此方法来写入某种宿主对象,即由原生 C++ 绑定创建的对象。 如果无法序列化 object,则应抛出合适的异常。

    This method is called to write some kind of host object, i.e. an object created by native C++ bindings. If it is not possible to serialize object, a suitable exception should be thrown.

    This method is not present on the Serializer class itself but can be provided by subclasses.