GlassStateCallback typedef
@brief Callback for reporting glass state changes (brightness, volume, display mode, etc.)
See VITURE_CALLBACK_ID_* constants in viture_protocol_public.h for detailed id and values
@param glass_state_id Identifier for the state being reported. @param glass_value Integer value associated with the state.
Implementation
typedef GlassStateCallback =
ffi.Pointer<ffi.NativeFunction<GlassStateCallbackFunction>>;