code: def age(self) -> timedelta:
      return common_utils.get_current_datetime() - self.submitted_at
  
imports: from datetime import datetime, timedelta
  from enum import Enum
  from typing import Dict, List, Optional, Tuple
  from pydantic import UUID4, BaseModel, Field
  from typing_extensions import Annotated
  from dstack._internal.core.models.backends.base import BackendType
  from dstack._internal.core.models.configurations import AnyRunConfiguration, RegistryAuth
  from dstack._internal.core.models.instances import InstanceOfferWithAvailability, InstanceType
  from dstack._internal.core.models.profiles import Profile
  from dstack._internal.core.models.repos import AnyRunRepoData
  from dstack._internal.utils import common
  from dstack._internal.utils.common import pretty_resources
label_desc: Use image node_id 1 for calling the JobSubmission obj's underlying member method code with example usage: obj.age() and returns: unknown