code: def test_load_boolean_mask(mask_path: Path) -> None:
      mask = io.load_boolean_mask(mask_path)
      assert mask.dtype == bool
  
file_path: brainiak/tests/io/test_io.py
imports: from pathlib import Path
  from typing import Iterable, Sequence
  import nibabel
  import numpy
  import pytest
  from brainiak import io
label_desc: Use image node_id 10 for calling a global function with example usage: test_load_boolean_mask(mask_path) without return types