code: def test_channelstack(self):
      data = numpy.ones((5, 10, 10))
  
      x = cellprofiler_core.image.Image(image=data)
  
      assert x.channelstack == False
  
      x.channelstack = True
  
      assert x.channelstack == True
  
imports: import math
  import numpy
  import cellprofiler_core.image
label_desc: Use image node_id 19 for calling the TestImage obj's underlying member method code with example usage: obj.test_channelstack() without return types