code: def test_gather_sync(ray_start_regular_shared):
      it = from_range(4)
      it = it.gather_sync()
      assert (
          repr(it)
          == "LocalIterator[ParallelIterator[from_range[4, shards=2]]"
          ".gather_sync()]"
      )
      assert sorted(it) == [0, 1, 2, 3]
  
imports: import sys
  import time
  import collections
  from collections import Counter
  import pytest
  import ray
  from ray.util.iter import from_items, from_iterators, from_range, from_actors, ParallelIteratorWorker, LocalIterator
  from ray._private.test_utils import Semaphore
label_desc: Use image node_id 25 for calling a global function with example usage: test_gather_sync(ray_start_regular_shared) without return types