code: @Deprecated
      public RpcInternalContext setLocalAddress(String host, int port) {
          if (host == null) {
              return this;
          }
          if (port < 0 || port > 0xFFFF) {
              port = 0;
          }
          // 提前检查是否为空，防止createUnresolved抛出异常，损耗性能
          this.localAddress = InetSocketAddress.createUnresolved(host, port);
          return this;
      }
docs: set local address.
  
  @param host the host
  @param port the port
  @return context local address