code: private DBService createTenantDBService(Tenant tenant) {
          m_logger.info("Creating DBService for tenant: {}", tenant.getName());
          Map<String, Object> dbServiceParams = tenant.getDefinition().getOptionMap("DBService");
          String dbServiceName = null;
          if (dbServiceParams == null || !dbServiceParams.containsKey("dbservice")) {
              dbServiceName = ServerParams.instance().getModuleParamString("DBService", "dbservice");
              Utils.require(!Utils.isEmpty(dbServiceName), "DBService.dbservice parameter is not defined");
          } else {
              dbServiceName = dbServiceParams.get("dbservice").toString();
          }
  
          DBService dbservice = null;
          try {
              @SuppressWarnings("unchecked")
              Class<DBService> serviceClass = (Class<DBService>) Class.forName(dbServiceName);
              Constructor<DBService> constructor = serviceClass.getConstructor(Tenant.class);
              dbservice = constructor.newInstance(tenant);
              dbservice.initialize();
              dbservice.start();
          } catch (IllegalArgumentException e) {
              throw new RuntimeException("Cannot load specified 'dbservice': " + dbServiceName, e);
          } catch (ClassNotFoundException e) {
              throw new RuntimeException("Could not load dbservice class '" + dbServiceName + "'", e);
          } catch (NoSuchMethodException e) {
              throw new RuntimeException("Required constructor missing for dbservice class: " + dbServiceName, e);
          } catch (SecurityException | InstantiationException | IllegalAccessException | InvocationTargetException e) {
              throw new RuntimeException("Could not invoke constructor for dbservice class: " + dbServiceName, e);
          } catch (Throwable e) {
              throw new RuntimeException("Failed to initialize DBService '" + dbServiceName +
                                         "' for tenant: " + tenant.getName(), e);
          }
          return dbservice;
      }
docs: Create a new DBService for the given tenant.