presto-main/src/main/java/io/prestosql/cost/PlanNodeStatsEstimate.java/PlanNodeStatsEstimate/getOutputSizeInBytes
class PlanNodeStatsEstimate:    public double getOutputSizeInBytes(Collection<Symbol> outputSymbols, TypeProvider types)
    {
        requireNonNull(outputSymbols, "outputSymbols is null");

        return outputSymbols.stream()
                .mapToDouble(symbol -> getOutputSizeForSymbol(getSymbolStatistics(symbol), types.get(symbol)))
                .sum();
    }