code: def test_brain_seg5():
      _test_brain_seg(
          np.array(
              [
                  [1.0, 0.0, 0.0],
                  [1.0, 0.0, 0.0],
                  [0.0, 1.0, 0.0],
                  [0.0, 1.0, 0.0],
                  [0.0, 0.0, 1.0],
              ]
          ),
          niters=3,
          beta=0.5,
          ngb_size=6,
      )
  
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 7 for calling a global function with example usage: test_brain_seg5() without return types