code: private void verifyApplicationCFs(ApplicationDefinition oldAppDef,
                                        ApplicationDefinition appDef) {
          // Add new table-level CFs:
          Tenant tenant = Tenant.getTenant(appDef);
          DBService dbService = DBService.instance(tenant);
          for (TableDefinition tableDef : appDef.getTableDefinitions().values()) {
              dbService.createStoreIfAbsent(objectsStoreName(tableDef), true);
              dbService.createStoreIfAbsent(termsStoreName(tableDef), true);
          }
          
          // Delete obsolete table-level CFs:
          if (oldAppDef != null) {
              for (TableDefinition oldTableDef : oldAppDef.getTableDefinitions().values()) {
                  if (appDef.getTableDef(oldTableDef.getTableName()) == null) {
                      dbService.deleteStoreIfPresent(objectsStoreName(oldTableDef));
                      dbService.deleteStoreIfPresent(termsStoreName(oldTableDef));
                  }
              }
          }
      }
docs: Verify that all ColumnFamilies needed for the given application exist.