The sinks of one destination, one per published stream: the subscription that writes the stream of aggregate in context is named <processor>.<aggregate> and writes through sinkOf. close closes what they share, after the node has stopped.
aggregate
context
<processor>.<aggregate>
The name the sink subscriptions take, before the aggregate's: wow.clickhouse-sink say.
wow.clickhouse-sink
The sink of the stream context publishes of aggregate.