How to use the matrix-react-sdk/lib/RoomNotifs.ALL_MESSAGES function in matrix-react-sdk

render: function() {
        var alertMeClasses = classNames({
            'mx_NotificationStateContextMenu_field': true,
            'mx_NotificationStateContextMenu_fieldSet': this.state.roomNotifState == RoomNotifs.ALL_MESSAGES_LOUD,
        });

        var allNotifsClasses = classNames({
            'mx_NotificationStateContextMenu_field': true,
            'mx_NotificationStateContextMenu_fieldSet': this.state.roomNotifState == RoomNotifs.ALL_MESSAGES,
        });

        var mentionsClasses = classNames({
            'mx_NotificationStateContextMenu_field': true,
            'mx_NotificationStateContextMenu_fieldSet': this.state.roomNotifState == RoomNotifs.MENTIONS_ONLY,
        });

        var muteNotifsClasses = classNames({
            'mx_NotificationStateContextMenu_field': true,
            'mx_NotificationStateContextMenu_fieldSet': this.state.roomNotifState == RoomNotifs.MUTE,
        });

        return (
            <div>
                <div>
                    <img height="107" width="20" src="img/notif-slider.svg"></div></div>

_onClickAllNotifs: function() {
        this._save(RoomNotifs.ALL_MESSAGES);
    },