code: public static Invoker getInvoker(Object proxyObject, String proxyType) {
          try {
              ExtensionClass<Proxy> ext = ExtensionLoaderFactory.getExtensionLoader(Proxy.class)
                  .getExtensionClass(proxyType);
              if (ext == null) {
                  throw ExceptionUtils.buildRuntime("consumer.proxy", proxyType,
                      "Unsupported proxy of client!");
              }
              Proxy proxy = ext.getExtInstance();
              return proxy.getInvoker(proxyObject);
          } catch (SofaRpcRuntimeException e) {
              throw e;
          } catch (Throwable e) {
              throw new SofaRpcRuntimeException(e.getMessage(), e);
          }
      }
docs: 解析出代理类的Invoker对象
  
  @param proxyObject 代理类实现
  @return Invoker对象