function createVnode(vtype, type, props, key, ref) {
    var vnode = {
        vtype: vtype,
        type: type,
        props: props,
        refs: refs,
        key: key,
        ref: ref
    };
    if (vtype === VSTATELESS || vtype === VCOMPONENT) {
        vnode.uid = getUid();
    }
    return vnode;
}
current stateful component's refs property
will attach to every vnode created by calling component.render method