docs: void addExportedTable(String tableName, String targetName, boolean isStream) {
          assert tableName != null && ! tableName.trim().isEmpty();
          assert targetName != null && ! targetName.trim().isEmpty();
  
          // store uppercase in the catalog as typename
          targetName = targetName.toUpperCase();
  
          if (isStream) {
              // insert the table's name into the export group
              NavigableSet<String> tableGroup = m_exportsByTargetName.get(targetName);
              if (tableGroup == null) {
                  tableGroup = new TreeSet<>();
                  m_exportsByTargetName.put(targetName, tableGroup);
              }
              tableGroup.add(tableName);
              return;
          }
          m_persistentTableTargetMap.put(tableName, targetName);
  
      }