code: def coll_fn_chatglm(stage="sft"):
      if stage == "sft":
          return preprocess_chatglm
      elif stage == "rm":
          return preprocess_chatglm_pairwise
      elif stage == "ppo":
          return preprocess_chatglm_eval
  
label_desc: Use image node_id 4 for calling a global function with example usage: coll_fn_chatglm(stage) and returns: preprocess_chatglm, preprocess_chatglm_pairwise, preprocess_chatglm_eval