code: def upgrade_settings(
      self, setting_values, variable_revision_number, module_name
  ):
      if variable_revision_number == 1:
          #
          # Was RGB-only. Convert values to CYMK-style
          #
          setting_values = (
              [SCHEME_CMYK] + setting_values + ["None"] * 4 + [1] * 4
          )
          variable_revision_number = 2
      if variable_revision_number == 2:
          #
          # Added composite mode
          #
          n_stacked = len(setting_values) - OFF_STACK_CHANNELS_V2
          new_setting_values = list(
              setting_values[:OFF_STACK_CHANNELS_V2]
          )
          new_setting_values.append(str(n_stacked))
          for i, image_name in enumerate(
              setting_values[OFF_STACK_CHANNELS_V2:]
          ):
              new_setting_values += [
                  image_name,
                  DEFAULT_COLORS[i % len(DEFAULT_COLORS)],
                  "1.0",
              ]
          setting_values = new_setting_values
          variable_revision_number = 3
      if variable_revision_number == 3:
          setting_values.insert(1, "No")
          variable_revision_number = 4
      return setting_values, variable_revision_number
  
imports: import numpy
  from cellprofiler_core.image import Image
  from cellprofiler_core.module import Module
  from cellprofiler_core.setting import Color, 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, RemoveSettingButton
  from cellprofiler_core.setting.subscriber import ImageSubscriber
  from cellprofiler_core.setting.text import ImageName, Float
label_desc: Use image node_id 10 for calling the GrayToColor obj's underlying member method code with example usage: obj.upgrade_settings(setting_values, variable_revision_number, module_name) and returns: setting_values,  variable_revision_number