text: """Base classes for Renault entities."""
  from __future__ import annotations
  
  from dataclasses import dataclass
  from typing import Optional, cast
  
  from homeassistant.helpers.entity import Entity, EntityDescription
  from homeassistant.helpers.typing import StateType
  from homeassistant.helpers.update_coordinator import CoordinatorEntity
  
  from .renault_coordinator import T
  from .renault_vehicle import RenaultVehicleProxy
  
  
  @dataclass
  class RenaultRequiredKeysMixin:
      """Mixin for required keys."""
  
      coordinator: str
  
  
  @dataclass
  class RenaultEntityDescription(EntityDescription, RenaultRequiredKeysMixin):
      """Class describing Renault entities."""
  
  
  class RenaultDataEntity(CoordinatorEntity[Optional[T]], Entity):
      """Implementation of a Renault entity with a data coordinator."""
  
      entity_description: RenaultEntityDescription
  
      def __init__(
          self,
          vehicle: RenaultVehicleProxy,
          description: RenaultEntityDescription,
      ) -> None:
          """Initialise entity."""
          super().__init__(vehicle.coordinators[description.coordinator])
          self.vehicle = vehicle
          self.entity_description = description
          self._attr_device_info = self.vehicle.device_info
          self._attr_unique_id = f"{self.vehicle.details.vin}_{description.key}".lower()
  
      def _get_data_attr(self, key: str) -> StateType:
          """Return the attribute value from the coordinator data."""
          if self.coordinator.data is None:
              return None
          return cast(StateType, getattr(self.coordinator.data, key))
  