apollo-client-config-data/src/main/java/com/ctrip/framework/apollo/config/data/extension/websocket/ApolloClientWebsocketExtensionInitializer.java/ApolloClientWebsocketExtensionInitializer/initialize
class ApolloClientWebsocketExtensionInitializer:  @Override
  public void initialize(ApolloClientProperties apolloClientProperties, Binder binder,
      BindHandler bindHandler) {
    throw new UnsupportedOperationException("apollo client websocket support is not complete yet.");
  }