code: def test_segmentation_3d():
      data = np.random.random(DIMS)
      _test_segmentation(
          Segmentation(data, mu=[0.25, 0.75], sigma=[1, 1])
      )
  
imports: from numbers import Number
  import numpy
  from numpy.testing import assert_almost_equal, assert_array_almost_equal
  from ....io.files import load
  from ....testing import anatfile
  from ..brain_segmentation import BrainT1Segmentation
  from ..segmentation import Segmentation
label_desc: Use image node_id 11 for calling a global function with example usage: test_segmentation_3d() without return types