text: """
  Support for Volvo heater.
  
  This platform uses the Volvo online service.
  
  For more details about this platform, please refer to the documentation at
  https://home-assistant.io/components/switch.volvooncall/
  """
  import logging
  
  from homeassistant.components.volvooncall import VolvoEntity, RESOURCES
  from homeassistant.helpers.entity import ToggleEntity
  
  _LOGGER = logging.getLogger(__name__)
  
  
  def setup_platform(hass, config, add_entities, discovery_info=None):
      """Set up Tellstick switches."""
      if discovery_info is None:
          return
      add_entities([VolvoSwitch(hass, *discovery_info)])
  
  
  class VolvoSwitch(VolvoEntity, ToggleEntity):
      """Representation of a Volvo switch."""
  
      @property
      def is_on(self):
          """Return true if switch is on."""
          return self.vehicle.is_heater_on
  
      def turn_on(self, **kwargs):
          """Turn the switch on."""
          self.vehicle.start_heater()
  
      def turn_off(self, **kwargs):
          """Turn the switch off."""
          self.vehicle.stop_heater()
  
      @property
      def icon(self):
          """Return the icon."""
          return RESOURCES[self._attribute][2]
  