/// When we get an update_persisted_channel call with no ChannelMonitorUpdate, we insert the
/// MonitorUpdateId here.
pub chain_sync_monitor_persistences: Mutex<HashMap<OutPoint, HashSet<MonitorUpdateId>>>,
/// When we get an update_persisted_channel call with no ChannelMonitorUpdate, we insert the
/// MonitorUpdateId here.
pub chain_sync_monitor_persistences: Mutex<HashMap<OutPoint, HashSet<MonitorUpdateId>>>,