class_docstr: Abstract base class for a file lock object.
docstr: :return: a flag indicating if this lock is thread local or not
code: def is_thread_local(self) -> bool:
      """:return: a flag indicating if this lock is thread local or not"""
      return self._is_thread_local
  
imports: from __future__ import annotations
  import contextlib
  import logging
  import os
  import time
  import warnings
  from abc import ABC, abstractmethod
  from dataclasses import dataclass
  from threading import local
  from typing import TYPE_CHECKING, Any, ClassVar
  from weakref import WeakValueDictionary
  from ._error import Timeout
label_desc: Use image node_id 3 for calling the BaseFileLock obj's underlying member method code with example usage: obj.is_thread_local() and returns: self