code: def batch_proto(self):
      proto_dir = self.guild_path("proto")
      proto_opref_path = os.path.join(proto_dir, ".guild", "opref")
      if os.path.exists(proto_opref_path):
          return for_dir(proto_dir)
      return None
  
imports: import os
  import random
  import threading
  import time
  import uuid
  import yaml
  from guild import opref
  from guild import util
  from guild import yaml_util
label_desc: Use image node_id 16 for calling the Run obj's underlying member method code with example usage: obj.batch_proto() and returns: None, for_dir