code: function(client, app, sinfos) {
    let item;
    for (let i = 0, l = sinfos.length; i < l; i++) {
      item = sinfos[i];
      if (hasProxy(client, item)) {
        continue;
      }
      client.addProxies(getProxyRecords(app, item));
    }
  }
docs: Generate proxy for the server infos.
  
  @param  {Object} client rpc client instance
  @param  {Object} app    application context
  @param  {Array} sinfos server info list