docs: async def set_heating_level(self, level, duration=0):
          """Update heating data json."""
          url = '{}/devices/{}'.format(API_URL, self.device.deviceid)
  
          # Catch bad inputs
          level = 10 if level < 10 else level
          level = 100 if level > 100 else level
  
          if self.side == 'left':
              data = {
                  'leftHeatingDuration': duration,
                  'leftTargetHeatingLevel': level
              }
          elif self.side == 'right':
              data = {
                  'rightHeatingDuration': duration,
                  'rightTargetHeatingLevel': level
              }
  
          set_heat = await self.device.api_put(url, data)
          if set_heat is None:
              _LOGGER.error('Unable to set eight heating level.')
          else:
              # Standard device json is returned after setting
              self.device.handle_device_json(set_heat['device'])