vue-ssr/dist/bundle-server.js
/**
   * Mix properties into target object.
   */
Mix properties into target object.
Mix properties into target object .
function extend(to, _from) {
    for (var key in _from) {
      to[key] = _from[key];
    }
    return to;
  }
function extend ( to , _from ) { for ( var key in _from ) { to [ key ] = _from [ key ] ; } return to ; }
Mix properties into target object.
Mix properties into target object .