refacto transformer with module hierarchy

src/device/helios.rs

@@ -2,6 +2,7 @@
 /// Configure udev:
 /// https://github.com/Grix/helios_dac/blob/master/docs/udev_rules_for_linux.md
 ///
+/*
 use helios_dac::NativeHeliosDacController;
 use helios_dac::{
     // Coordinate,
@@ -10,6 +11,7 @@ use helios_dac::{
     Frame,
     Point,
 };
+*/
 use crate::conf::HeliosConf;
 use crate::device::common::{Device, Status};
 
@@ -33,4 +35,4 @@ impl Device for HeliosDevice {
             properties: vec!["foo".to_string()],
         };
     }
-}
+}