code: def replace(self, obj, field, func):
      original = getattr(obj, field, None)
      if original is None:
          return None
  
      self.replaced.append((obj, field, original))
      setattr(obj, field, func)
  
      return original
  
imports: import ldm.modules.encoders.modules
  import open_clip
  import torch
  import transformers.utils.hub
  from modules import shared
label_desc: Use image node_id 2 for calling the ReplaceHelper obj's underlying member method code with example usage: obj.replace(obj, field, func) and returns: original, None