CatalogItemSizeList<CatalogItemSizeRollup> rollups =
new CatalogItemSizeList<CatalogItemSizeRollup>();
rollups.add(dbSizes.tableRollup());
rollups.add(dbSizes.viewRollup());
rollups.add(dbSizes.indexRollup());
CatalogItemSizeRollup rollupRollup = rollups.rollup(1);
sb.append("<table class='table size-summary-table'>\n");
generateSizeRollupSummary("tables whose row data ", "table", sb, rollups.get(0));
generateSizeRollupSummary("materialized views whose row data ", "view", sb, rollups.get(1));
generateSizeRollupSummary("indexes whose key data and overhead ", "index", sb, rollups.get(2));