code: def display_combine(self, workspace, figure):
      import matplotlib.cm
  
      input_image = workspace.display_data.input_image
      output_image = workspace.display_data.output_image
      figure.set_subplots((1, 2))
      figure.subplot_imshow_color(
          0,
          0,
          input_image,
          title="Original image: %s" % self.image_name.value,
      )
      figure.subplot_imshow(
          0,
          1,
          output_image,
          title="Grayscale image: %s" % self.grayscale_name.value,
          colormap=matplotlib.cm.Greys_r,
          sharexy=figure.subplot(0, 0),
      )
  
imports: import re
  import matplotlib.colors
  import numpy
  from cellprofiler_core.image import Image
  from cellprofiler_core.module import Module
  from cellprofiler_core.setting import Binary
  from cellprofiler_core.setting import HiddenCount
  from cellprofiler_core.setting import SettingsGroup
  from cellprofiler_core.setting import ValidationError
  from cellprofiler_core.setting.choice import Choice
  from cellprofiler_core.setting.do_something import DoSomething
  from cellprofiler_core.setting.do_something import RemoveSettingButton
  from cellprofiler_core.setting.subscriber import ImageSubscriber
  from cellprofiler_core.setting.text import Float
  from cellprofiler_core.setting.text import ImageName
  from cellprofiler_core.setting.text import Integer
label_desc: Use image node_id 14 for calling the ColorToGray obj's underlying member method code with example usage: obj.display_combine(workspace, figure) without return types