在Golang中处理JSON继承

I have a Java code that handles json inheritance the code is like this :

public class BaseMessage {
    private String messageId;
    private Integer type;
    ...
}

public class TextMessage  extends BaseMessage {
    private String recipient;
    private String sender;
    ...
}

public class SystemTextMessage  extends BaseMessage {
    private String field1;
    private String field2;
    ...
}

And some other classes

And I'm using Gson library like this:

    RuntimeTypeAdapterFactory<BaseMessage> runtimeTypeAdapterFactory = RuntimeTypeAdapterFactory
            .of(BaseMessage.class, "type")
            .registerSubtype(TextMessage.class,
                    String.valueOf(MessageType.TEXT_MESSAGE))
            .registerSubtype(SystemTextMessage.class,
                    String.valueOf(MessageType.SYSTEM_MESSAGE))
            ;

Gson gson = new GsonBuilder().registerTypeAdapterFactory(runtimeTypeAdapterFactory).create();
Type listType = new TypeToken<List<BaseMessage>>(){}.getType();
List<BaseMessage> list = gson.fromJson(json, listType);

And then I just iterate through the List and comparing by "instanceof".

And what about golang? Is there any way to do same thing? I failed to find something similar. Any 1 can help? Thank you.