code: def test_unpack_remotedata():
      def assert_eq(
          keys1: set[WrappedKey], keys2: set[WrappedKey]
      ) -> None:
          if len(keys1) != len(keys2):
              assert False
          if not keys1:
              assert True
          if not all(isinstance(k, WrappedKey) for k in keys1 & keys2):
              assert False
          assert sorted([k.key for k in keys1]) == sorted(
              [k.key for k in keys2]
          )
  
      assert unpack_remotedata(1) == (1, set())
      assert unpack_remotedata(()) == ((), set())
  
      res, keys = unpack_remotedata(WrappedKey("mykey"))
      assert res == "mykey"
      assert_eq(keys, {WrappedKey("mykey")})
  
      # Check unpack of SC that contains a wrapped key
      sc = SubgraphCallable(
          {"key": (WrappedKey("data"),)}, outkey="key", inkeys=["arg1"]
      )
      dsk = (sc, "arg1")
      res, keys = unpack_remotedata(dsk)
      assert (
          res[0] != sc
      )  # Notice, the first item (the SC) has been changed
      assert res[1:] == ("arg1", "data")
      assert_eq(keys, {WrappedKey("data")})
  
      # Check unpack of SC when it takes a wrapped key as argument
      sc = SubgraphCallable(
          {"key": ("arg1",)}, outkey="key", inkeys=[WrappedKey("arg1")]
      )
      dsk = (sc, "arg1")
      res, keys = unpack_remotedata(dsk)
      assert res == (
          sc,
          "arg1",
      )  # Notice, the first item (the SC) has NOT been changed
      assert_eq(keys, set())
  
imports: from __future__ import annotations
  import asyncio
  import random
  from unittest import mock
  import pytest
  from dask.optimization import SubgraphCallable
  from distributed import wait
  from distributed.compatibility import asyncio_run
  from distributed.config import get_loop_factory
  from distributed.core import ConnectionPool, Status
  from distributed.utils_comm import WrappedKey, gather_from_workers, pack_data, retry, subs_multiple, unpack_remotedata
  from distributed.utils_test import BarrierGetData, BrokenComm, gen_cluster, inc
label_desc: Use image node_id 6 for calling a global function with example usage: test_unpack_remotedata() without return types