code: def dense_union_array():
      return pa.UnionArray.from_dense(
          pa.array([0, 1] * 500, type=pa.int8()),
          pa.array(
              [i if i % 2 == 0 else (i % 3) % 2 for i in range(1000)],
              type=pa.int32(),
          ),
          [pa.array(list(range(1000))), pa.array([True, False])],
      )
  
imports: import logging
  import os
  import sys
  from unittest import mock
  import numpy
  import pyarrow
  import pyarrow.parquet
  import pytest
  from packaging.version import parse
  from pytest_lazyfixture import lazy_fixture
  import ray
  import ray.cloudpickle
  from ray._private.arrow_serialization import _align_bit_offset, _bytes_for_bits, _copy_bitpacked_buffer_if_needed, _copy_buffer_if_needed, _copy_normal_buffer_if_needed, _copy_offsets_buffer_if_needed
  from ray._private.utils import _get_pyarrow_version
  from ray.data.extensions.tensor_extension import ArrowTensorArray, ArrowVariableShapedTensorArray
  from ray.tests.conftest import *
label_desc: Use image node_id 24 for calling a global function with example usage: dense_union_array() and returns: pa