presto-tpch/src/main/java/io/prestosql/plugin/tpch/statistics/TableStatisticsData.java/TableStatisticsData/TableStatisticsData
class TableStatisticsData:    @JsonCreator
    public TableStatisticsData(
            @JsonProperty("rowCount") long rowCount,
            @JsonProperty("columns") Map<String, ColumnStatisticsData> columns)
    {
        this.rowCount = rowCount;
        this.columns = ImmutableMap.copyOf(columns);
    }