code: def update(self, example):
      return gr.Image.update(value=example[0]), gr.Textbox.update(
          value=example[1]
      )
  
imports: import gradio
  import torch
  from mmengine.logging import MMLogger
  from mmdet.apis import DetInferencer
  from projects.XDecoder.xdecoder.inference import ImageCaptionInferencer, RefImageCaptionInferencer, TextToImageRegionRetrievalInferencer
label_desc: Use image node_id 2 for calling the ReferImageCaptionTab obj's underlying member method code with example usage: obj.update(example) and returns: gr,  gr