Retrofit + Gson无法解析simple Map

public class MapWrapper {
    private Map<String, Object> data;

    public Map<String, Object> getData() {
        return data;
    }
}

public interface ApiService {
    @GET("api/endpoint")
    Call<MapWrapper> getData();
}

ApiService apiService = retrofit.create(ApiService.class);
Call<MapWrapper> call = apiService.getData();
call.enqueue(new Callback<MapWrapper>() {
    @Override
    public void onResponse(Call<MapWrapper> call, Response<MapWrapper> response) {
        if (response.isSuccessful()) {
            Map<String, Object> data = response.body().getData();
            // 处理获取到的数据
        } else {
            // 处理请求失败的情况
        }
    }

    @Override
    public void onFailure(Call<MapWrapper> call, Throwable t) {
        // 处理请求失败的情况
    }
});