Function stat_collector 

pub async fn stat_collector(
    config: Config,
    maybe_locked_stats: Option<Arc<RwLock<MonitordStats>>>,
    output_stats: bool,
    maybe_connection: Option<Connection>,
) -> Result<Option<Connection>, MonitordError>

Main statictic collection function running what’s required by configuration in parallel Takes an optional locked stats struct to update and to output stats to STDOUT or not. Takes an optional D-Bus connection. Returns Some(connection) if the collection cycle completed without errors (meaning the connection is reusable), None if errors occurred.