docs: def get_color_coordinate(self):
          """stub"""
          if self.has_color_coordinate():
              color_dict = self.my_osid_object._my_map['colorCoordinate']
              return RGBColorCoordinate(values=color_dict['values'],
                                        uncertainty_minus=color_dict['uncertaintyMinus'],
                                        uncertainty_plus=color_dict['uncertaintyPlus'])
          raise IllegalState('No color coordinate')