presto-main/src/main/java/io/prestosql/sql/planner/sanity/ValidateAggregationsWithDefaultValues.java/ValidateAggregationsWithDefaultValues/SeenExchanges
class ValidateAggregationsWithDefaultValues:        SeenExchanges(boolean localRepartitionExchange, boolean remoteRepartitionExchange)
        {
            this.localRepartitionExchange = localRepartitionExchange;
            this.remoteRepartitionExchange = remoteRepartitionExchange;
        }