小游戏怎么分辨是转发分享到个人还是群组

wx.shareAppMessage({            title: "",            path: '/pages/share/share?id=123',            imageUrl: '/res/share.jpg',            success(res){                console.log("转发成功!!!");                if(res.shareTickets == null || res.shareTickets == undefined || res.shareTickets == ""){                    console.log("res.shareTickets is null");                     cc.log("你分享到个人而不是群")                }else{                    console.log("res.shareTickets is not null");                    if(res.shareTickets.length > 0){                        cc.log("成功分享到群里")                    }                }            },            fail(res){                console.log("转发失败!!!");            }        })

这样写的话是只有在群里面有消息的时候才能辨别出来是群组，当群里面没有消息的时候res.shareTickets = undefined  ，

请问还有别的方法区分吗？