code: @Override
      public synchronized T refer() {
          if (proxyIns != null) {
              return proxyIns;
          }
  
          referenceConfig = new ReferenceConfig<T>();
          covert(consumerConfig, referenceConfig);
  
          proxyIns = referenceConfig.get();
  
          return proxyIns;
      }
docs: Refer t.
  
  @return the t
  @throws SofaRpcRuntimeException the init error exception