presto-main/src/main/java/io/prestosql/operator/OperatorContext.java/OperatorContext/aggregateRevocableMemoryContext
class OperatorContext:    public AggregatedMemoryContext aggregateRevocableMemoryContext()
    {
        return new InternalAggregatedMemoryContext(operatorMemoryContext.aggregateRevocableMemoryContext(), revocableMemoryFuture, this::updatePeakMemoryReservations, false);
    }