code: def test_equalize(ray_start_regular_shared):
      verify_equalize_result([], [])
      verify_equalize_result([[]], [[]])
      verify_equalize_result([[[1]], []], [[], []])
      verify_equalize_result(
          [[[1], [2, 3]], [[4]]], [[[1], [2]], [[4], [3]]]
      )
      verify_equalize_result([[[1], [2, 3]], []], [[[1]], [[2]]])
      verify_equalize_result(
          [[[1], [2, 3], [4, 5]], [[6]], []],
          [[[1], [2]], [[6], [3]], [[4, 5]]],
      )
      verify_equalize_result(
          [[[1, 2, 3], [4, 5]], [[6]], []],
          [[[4, 5]], [[6], [1]], [[2, 3]]],
      )
  
imports: import itertools
  import math
  import random
  import time
  from unittest.mock import patch
  import numpy
  import pandas
  import pytest
  import ray
  from ray.data._internal.block_list import BlockList
  from ray.data._internal.equalize import _equalize
  from ray.data._internal.execution.interfaces import RefBundle
  from ray.data._internal.logical.interfaces import LogicalPlan
  from ray.data._internal.logical.operators.input_data_operator import InputData
  from ray.data._internal.plan import ExecutionPlan
  from ray.data._internal.split import _drop_empty_block_split, _generate_global_split_results, _generate_per_block_split_indices, _generate_valid_indices, _split_at_indices, _split_single_block
  from ray.data._internal.stats import DatasetStats
  from ray.data.block import BlockAccessor, BlockMetadata
  from ray.data.dataset import Dataset
  from ray.data.tests.conftest import *
  from ray.data.tests.util import extract_values
  from ray.tests.conftest import *
label_desc: Use image node_id 25 for calling a global function with example usage: test_equalize(ray_start_regular_shared) without return types