问题
Earlier we used get them using this.AmCharts
AmCharts had provided us AmChartsService , using this we could get an hold of all the charts in the dom , with the upgrade what is the new way to get all the charts in the page ?
来源：https://stackoverflow.com/questions/54821598/get-an-instance-of-amchart-using-id-all-the-charts-in-amcharts4-angular-typesc