code: public RegistryCenter load(final RegistryCenterConfiguration regCenterConfig) {
          Preconditions.checkNotNull(regCenterConfig, "Registry center configuration cannot be null.");
          RegistryCenter result = newService(regCenterConfig.getType(), regCenterConfig.getProperties());
          result.init(regCenterConfig);
          return result;
      }
docs: Load registry center from SPI.
  
  @param regCenterConfig registry center configuration
  @return registry center