docstr: The time the object was last modified in seconds since the epoch, UTC.
  
  The meaning of modification time is cloud-defined. In some clouds, it is the creation
  time. In some clouds, it is the more recent of the creation time or the time of the most
  recent metadata modification.
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code: def time_modified(self) -> datetime.datetime:
      """The time the object was last modified in seconds since the epoch, UTC.
  
      The meaning of modification time is cloud-defined. In some clouds, it is the creation
      time. In some clouds, it is the more recent of the creation time or the time of the most
      recent metadata modification.
  
      """
  
imports: from typing import Any, AsyncContextManager, Optional, Type, Set, AsyncIterator, Callable, TypeVar, Generic, List, Awaitable, Union, Tuple
  from typing_extensions import ParamSpec
  from types import TracebackType
  import abc
  import asyncio
  import datetime
  from hailtop.utils import retry_transient_errors, OnlineBoundedGather2
  from .stream import EmptyReadableStream, ReadableStream, WritableStream
  from .exceptions import FileAndDirectoryError
label_desc: Use image node_id 4 for calling the FileStatus obj's underlying member method code with example usage: obj.time_modified() without return types