amchart4中的“Rounded Edge Stacked Grouped Chart”可以翻译为“圆角边缘堆叠分组图表”。下面是一个包含代码示例的解决方法：

// 导入amchart4库
import * as am4core from "@amcharts/amcharts4/core";
import * as am4charts from "@amcharts/amcharts4/charts";
import am4themes_animated from "@amcharts/amcharts4/themes/animated";

// 设置主题
am4core.useTheme(am4themes_animated);

// 创建图表实例
var chart = am4core.create("chartdiv", am4charts.XYChart);

// 设置图表数据
chart.data = [
  {
    category: "Category 1",
    value1: 10,
    value2: 15,
    value3: 5
  },
  {
    category: "Category 2",
    value1: 20,
    value2: 10,
    value3: 15
  },
  {
    category: "Category 3",
    value1: 15,
    value2: 5,
    value3: 10
  }
];

// 创建x轴
var categoryAxis = chart.xAxes.push(new am4charts.CategoryAxis());
categoryAxis.dataFields.category = "category";

// 创建y轴
var valueAxis = chart.yAxes.push(new am4charts.ValueAxis());

// 创建堆叠柱状图系列
var series1 = chart.series.push(new am4charts.ColumnSeries());
series1.dataFields.valueY = "value1";
series1.dataFields.categoryX = "category";
series1.name = "Series 1";
series1.stacked = true;
series1.columns.template.column.cornerRadiusTopLeft = 10;
series1.columns.template.column.cornerRadiusTopRight = 10;

var series2 = chart.series.push(new am4charts.ColumnSeries());
series2.dataFields.valueY = "value2";
series2.dataFields.categoryX = "category";
series2.name = "Series 2";
series2.stacked = true;
series2.columns.template.column.cornerRadiusTopLeft = 10;
series2.columns.template.column.cornerRadiusTopRight = 10;

var series3 = chart.series.push(new am4charts.ColumnSeries());
series3.dataFields.valueY = "value3";
series3.dataFields.categoryX = "category";
series3.name = "Series 3";
series3.stacked = true;
series3.columns.template.column.cornerRadiusTopLeft = 10;
series3.columns.template.column.cornerRadiusTopRight = 10;

// 添加图例
chart.legend = new am4charts.Legend();

// 渲染图表
chart.exporting.menu = new am4core.ExportMenu();
chart.exporting.menu.align = "right";
chart.exporting.menu.verticalAlign = "top";

// 添加滚动条
chart.scrollbarX = new am4core.Scrollbar();
chart.scrollbarY = new am4core.Scrollbar();

在上面的代码中，我们创建了一个堆叠柱状图，并使用column.cornerRadiusTopLeft和column.cornerRadiusTopRight属性为柱状图的顶部边缘添加了圆角效果。你可以根据需要调整这些值来改变圆角的弧度。最后，我们添加了图例和滚动条，并渲染了图表。