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