docs: protected SibRaStringGenerator getStringGenerator() {
  
          final SibRaStringGenerator generator = new SibRaStringGenerator(this);
          generator.addField("cancelled", _cancelled);
          generator.addField("connection", _connection);
          generator.addField("session", _session);
          generator.addField("endpointFactory", _endpointFactory);
          generator.addField("invoker", _invoker);
          generator.addField("endpointConfiguration", _endpointConfiguration);
          generator.addField("requestMetries",null /*_requestMetrics*/);
          return generator;
  
      }