presto-main/src/main/java/io/prestosql/operator/exchange/LocalExchangeBufferInfo.java/LocalExchangeBufferInfo/mergeWith
class LocalExchangeBufferInfo:    @Override
    public LocalExchangeBufferInfo mergeWith(LocalExchangeBufferInfo other)
    {
        return new LocalExchangeBufferInfo(bufferedBytes + other.getBufferedBytes(), bufferedPages + other.getBufferedPages());
    }