presto-main/src/main/java/io/prestosql/operator/aggregation/multimapagg/LegacyGroupedMultimapAggregationState.java/LegacyGroupedMultimapAggregationState/getEstimatedSize
class LegacyGroupedMultimapAggregationState:    @Override
    public long getEstimatedSize()
    {
        return INSTANCE_SIZE + keyBlockBuilders.sizeOf() + valueBlockBuilders.sizeOf() + size;
    }