按下面的要求编写代码：arcgis api for js 创建FeatureLayer，其中FeatureLayer图层中包含很多多边形要素。要求提供一个多边形/矩形绘制工具，通过点击多边形按钮或者矩形按钮进行形状绘制。判断绘制的形状与FeatureLayer中的多边形要素的包含关系，突出显示包含在绘制的形状内部的要素

以下是基于ArcGIS API for JavaScript的代码示例，实现创建FeatureLayer、绘制多边形/矩形、判断包含关系和突出显示：

require([
  "esri/Map",
  "esri/views/MapView",
  "esri/layers/FeatureLayer",
  "esri/Graphic",
  "esri/geometry/geometryEngine",
  "esri/widgets/Sketch/SketchViewModel",
  "esri/widgets/Sketch",
  "esri/widgets/Expand",
  "dojo/domReady!"
], function(Map, MapView, FeatureLayer, Graphic, geometryEngine, SketchViewModel, Sketch, Expand) {

  // 创建地图和视图
  var map = new Map({
    basemap: "streets-navigation-vector"
  });

  var view = new MapView({
    container: "viewDiv",
    map: map,
    center: [-118.805, 34.027],
    zoom: 13
  });

  // 创建 FeatureLayer
  var featureLayer = new FeatureLayer({
    url: "https://sampleserver6.arcgisonline.com/arcgis/rest/services/Census/MapServer/2"
  });

  // 向地图添加 FeatureLayer
  map.add(featureLayer);

  // 创建 SketchViewModel 和 Sketch 组件
  var sketchViewModel = new SketchViewModel({
    view: view,
    layer: new GraphicsLayer(),
    pointSymbol: {
      type: "simple-marker",
      style: "square",
      size: "8px",
      color: "blue",
      outline: {
        color: [255, 255, 0],
        width: 3
      }
    },
    polylineSymbol: {
      type: "simple-line",
      color: "blue",
      width: 3
    },
    polygonSymbol: {
      type: "simple-fill",
      color: [0, 0, 200, 0.3],
      style: "solid",
      outline: {
        color: "blue",
        width: 2
      }
    }
  });

  var sketch = new Sketch({
    view: view,
    viewModel: sketchViewModel,
    container: "sketchDiv"
  });

  // 创建 Expand 组件，用于显示“多边形”和“矩形”按钮
  var sketchExpand = new Expand({
    view: view,
    content: sketch.domNode,
    expandIconClass: "esri-icon-edit",
    group: "top-right"
  });
  view.ui.add(sketchExpand, "top-right");

  // 监听 SketchViewModel 的 create event，获取绘制完成的图形
  sketchViewModel.on("create", function(event) {
    if (event.state === "complete") {
      // 获取绘制完成的图形
      var graphic = new Graphic({
        geometry: event.geometry,
        symbol: sketchViewModel.polygonSymbol
      });
      // 向地图添加图形
      view.graphics.add(graphic);
      
      // 判断包含关系
      var contains = geometryEngine.contains(featureLayer.fullExtent, event.geometry);
      if (contains) {
        // 高亮显示包含在绘制的形状内部的要素
        featureLayer.definitionExpression = "1=1";
        featureLayer.outFields = ["*"];
        featureLayer.queryFeatures().then(function(results) {
          var graphics = results.features.filter(function(feature) {
            return geometryEngine.contains(event.geometry, feature.geometry);
          }).map(function(feature) {
            return new Graphic({
              geometry: feature.geometry,
              symbol: {
                type: "simple-fill",
                color: [255, 0, 0, 0.5],
                style: "solid",
                outline: {
                  color: "red",
                  width: 2
                }
              }
            });
          });
          view.graphics.addMany(graphics);
        });
      }
    }
  });

});

该代码示例中，通过 SketchViewModel 和 Sketch 组件实现了绘制多边形/矩形的功能，并通过 geometryEngine.contains() 方法判断绘制的形状与 FeatureLayer 中的多边形要素的包含关系，最后将包含在绘制的形状内部的要素突出显示。