let start_firmware_update = |file_name: &str| -> () {
    match hid_device_manager.connect_to_bootstrap_loader_mode_compatible_device() {
      Ok(updatable_device) => {
        match updatable_device.start_first_part() {
          Ok(_) => {
            match hid_device_manager.connect_to_bootstrap_loader_mode_compatible_device() {
              Ok(updatable_device_next) => {
                match updatable_device_next.start_second_part(Path::new(file_name)) {
                  Ok(_) => {
                    println!("Firmware has been updated !");
                  },
                  Err(reason) => println!("{}", Red.paint(format!("Unable to update the firmware. Reason: {}", reason)))
                }
              },
              Err(_) => println!("{}", Red.paint("Unable to connect to the Bootstrap Loader mode compatible device. Make sure the USB cable is properly plugged in."))
            }
          },
          Err(reason) => println!("{}", Red.paint(format!("Unable to update the firmware. Reason: {}", reason)))
        }
      },
      Err(_) => println!("{}", Red.paint("Unable to connect to the Bootstrap Loader mode compatible device. Make sure the USB cable is properly plugged in."))
    }
  };