pub trait RegulatoryRegionWatcherProxyInterface: Send + Sync {
type GetUpdateResponseFut: Future<Output = Result<String, Error>> + Send;
type GetRegionUpdateResponseFut: Future<Output = Result<Option<String>, Error>> + Send;
// Required methods
fn get_update(&self) -> Self::GetUpdateResponseFut;
fn get_region_update(&self) -> Self::GetRegionUpdateResponseFut;
}