code: def test_isosurface():
      # Create data
      vol = np.arange(1000).reshape((10, 10, 10)).astype(np.float32)
  
      # Create visual
      iso = scene.visuals.Isosurface(vol, level=200)
  
      # Change color (regression test for a bug that caused this to crash)
      iso.color = (1.0, 0.8, 0.9, 1.0)
  
imports: import numpy
  from vispy import scene
  from vispy.testing import run_tests_if_main, requires_pyopengl
label_desc: Use image node_id 1 for calling a global function with example usage: test_isosurface() without return types