code: def resolver(root, file_id):
      return os.path.join(root, f"{file_id}.jpg")
  
imports: import os
  import flash
  import torch
  from flash.core.data.utils import download_data
  from flash.image import ImageClassificationData, ImageClassifier
label_desc: Use image node_id 1 for calling a global function with example usage: resolver(root, file_id) and returns: os