code: def __init__(self, *args: Any, **kwargs: Any):
      super().__init__(*args, **kwargs)
      self.seen = set()
      self.limit = 1
      self.blocking_get_or_create = asyncio.Event()
      self.block_get_or_create = asyncio.Event()
  
imports: from __future__ import annotations
  import asyncio
  import contextlib
  from typing import Any
  from unittest import mock
  import pytest
  from dask.typing import Key
  from distributed import Worker
  from distributed.shuffle._core import ShuffleId, ShuffleSpec, id_from_key
  from distributed.shuffle._merge import hash_join
  from distributed.shuffle._worker_plugin import ShuffleRun, _ShuffleRunManager
  from distributed.utils_test import gen_cluster
  import pandas
  import dask
  from dask.dataframe._compat import PANDAS_GE_200, tm
  from dask.dataframe.utils import assert_eq
  from dask.utils_test import hlg_layer_topological
label_desc: Use image node_id 1 to create a new LimitedGetOrCreateShuffleRunManager object from inherited base classes: _ShuffleRunManager with example: obj = LimitedGetOrCreateShuffleRunManager()