presto-main/src/main/java/io/prestosql/operator/OperatorContext.java/InternalAggregatedMemoryContext/newAggregatedMemoryContext
class InternalAggregatedMemoryContext:        @Override
        public AggregatedMemoryContext newAggregatedMemoryContext()
        {
            return new InternalAggregatedMemoryContext(delegate.newAggregatedMemoryContext(), memoryFuture, allocationListener, true);
        }