code: def test_openfoam_decompose_polyhedra():
      reader = get_cavity_reader()
      reader.decompose_polyhedra = False
      assert reader.decompose_polyhedra is False
      reader.decompose_polyhedra = True
      assert reader.decompose_polyhedra is True
  
imports: import os
  import platform
  import numpy
  import pytest
  import pyvista
  from pyvista import examples
  from pyvista.core.utilities.fileio import _try_imageio_imread
  from pyvista.examples.downloads import download_file
label_desc: Use image node_id 31 for calling a global function with example usage: test_openfoam_decompose_polyhedra() without return types