code: def _get_timestamp(self):
      return util.find_apply(
          [
              lambda: self.get("started"),
              lambda: self.get("initialized"),
              lambda: 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 15 for calling the Run obj's underlying member method code with example usage: obj._get_timestamp() and returns: util