pub trait ControlProxyInterface: Send + Sync {
type StartResponseFut: Future<Output = Result<ControlStartResult, Error>> + Send;
// Required method
fn start(
&self,
element_name: &str,
initial_current_level: u8,
required_level_client: ClientEnd<RequiredLevelMarker>,
current_level_client: ClientEnd<CurrentLevelMarker>,
) -> Self::StartResponseFut;
}