logitech G900:
  type: ratbag-device
  endpoints:
    - 05 00 00...
    - 05 00 00...
    - 05 00 00...
  brain:
    type: LogitechHIDPP20Brain
    parameters:
      features:
         - 0x0001
         - 0x8001
  physical:
    - RGB0:
      type: RGBLed
  actuators:
    - x:
      type: OpticalSensor
      parameters:
        default_dpi: 1000
    - y:
      type: OpticalSensor
      parameters:
        default_dpi: 1000
    - wheel:
      type: Wheel
    - b0:
      type: Button
    - b1:
      type: Button
    - b2:
      type: Button
    - b3:
      type: Button
    - b4:
      type: Button
    - b5:
      type: Button
    - b6:
      type: Button
    - b7:
      type: Button
    - b8:
      type: Button
    - b9:
      type: Button
    - b10:
      type: Button

@FFY00: For instantiating a Logitech G900 for example: you define a `logitech-g900.yaml`: ```yaml logitech G900: type: ratbag-device endpoints: - 05 00 00... - 05 00 00... - 05 00 00... brain: type: LogitechHIDPP20Brain parameters: features: - 0x0001 - 0x8001 physical: - RGB0: type: RGBLed actuators: - x: type: OpticalSensor parameters: default_dpi: 1000 - y: type: OpticalSensor parameters: default_dpi: 1000 - wheel: type: Wheel - b0: type: Button - b1: type: Button - b2: type: Button - b3: type: Button - b4: type: Button - b5: type: Button - b6: type: Button - b7: type: Button - b8: type: Button - b9: type: Button - b10: type: Button ``` `BasedDevice` then has a class method that takes a dictionary (parsed from the YAML above) and instantiate the matching BaseDevice with all of its components. If you want to be fancy, you can implement an `include` keyword (like @whot did in https://github.com/whot/uji/blob/master/uji.py#L239-L272), so you can define a *generic* mouse without a brain with the common x, y, wheel and 3 buttons.