code: def test_multichannel_grayscale_volume(self):
      data = numpy.ones((5, 10, 10))
  
      x = cellprofiler_core.image.Image(image=data, dimensions=3)
  
      assert not x.multichannel
  
imports: import math
  import numpy
  import cellprofiler_core.image
label_desc: Use image node_id 12 for calling the TestImage obj's underlying member method code with example usage: obj.test_multichannel_grayscale_volume() without return types