presto-memory-context/src/main/java/io/prestosql/memory/context/RootAggregatedMemoryContext.java/RootAggregatedMemoryContext/tryUpdateBytes
class RootAggregatedMemoryContext:    @Override
    synchronized boolean tryUpdateBytes(String allocationTag, long delta)
    {
        if (reservationHandler.tryReserveMemory(allocationTag, delta)) {
            addBytes(delta);
            return true;
        }
        return false;
    }